Red Sox’ Wyatt Mills (right elbow inflammation) behind in throwing program, Alex Cora says

Injured Red Sox reliever Wyatt Mills is behind in his throwing program, manager Alex Cora told reporters (including MassLive.com’s Christopher Smith) prior to Saturday’s 14-5 win over the Tigers in Detroit.

Mills began the season on the 15-day injured list with right elbow inflammation. The right-hander was initially shut down from throwing shortly after allowing four runs on four hits, one walk, and two hit batsman in one inning against the Blue Jays in his final outing of the spring on March 13.

Prior to that, though, Mills had pitched well in Grapefruit League play, yielding just one run on three hits, four walks, and 10 strikeouts over four appearances spanning five innings of work in which he held opposing hitters to a .158 batting average against.

As MassLive.com’s Chris Cotillo reported last month, Mills was officially diagnosed with elbow inflammation in his right flexor muscle. And while the 28-year-old was able to start playing catch earlier this week, his progress has been slower than anticipated.

“Right now, he’s a little bit behind,” Cora said of Mills at Comerica Park. “He hasn’t started his throwing program yet. Not responding the way we thought in the beginning.”

The Red Sox acquired Mills from the Royals in exchange for relief prospect Jacob Wallace back in December. The Gonzaga product is coming off a 2022 campaign in which he forged a 4.60 ERA — but much more respectable 3.62 FIP — with 26 strikeouts to 13 walks over 27 appearances (29 1/3 innings) between stops in Seattle and Kansas City.

Equipped with a unique sidearm delivery, Boston brought in Mills hoping that he could replicate the same sort of success fellow reliever John Schreiber enjoyed during his breakout season last year. Like Schreiber, the 6-foot-4, 214-pound Mills  throws from a similar angle and operates with a three-pitch mix that consists of a four-seam fastball, a slider, and a sinker.

Given Saturday’s development, when Mills will be cleared to start pitching in games again is an unknown at this point. Looking ahead, Mills — who does not turn 29 until January — has just one minor-league option remaining but is not eligible for salary arbitration until 2026.

(Picture of Wyatt Mills: Doug Murray/Icon Sportswire via Getty Images)

Red Sox acquire Wyatt Mills from Royals, designate Eric Hosmer for assignment

The Red Sox have acquired right-hander Wyatt Mills from the Royals in exchange for relief prospect Jacob Wallace, the club announced on Friday. In order to make room for Mills on the 40-man roster, first baseman Eric Hosmer was designated for assignment.

Mills, who turns 28 next month, was designated for assignment himself earlier this week. The righty split the 2022 season between the Mariners and Royals and posted a 4.60 ERA — but much more respectable 3.62 FIP — with 26 strikeouts to 13 walks over 27 appearances spanning 29 1/3 innings of work.

A former third-round draft pick of the Mariners out of Gonzaga University in 2017, Mills first broke in with Seattle in May 2021. He pitched to a 9.95 ERA and 4.35 FIP with 11 strikeouts to seven walks across 11 outings (12 2/3 innings) last season and opened the 2022 campaign at Triple-A Tacoma.

The Mariners recalled Mills in late April and he proceeded to put up a 4.15 ERA (3.46 FIP) with six punchouts to three walks in his first eight appearances (8 2/3 innings) of the season before being traded to to the Royals with fellow righty William Fleming in exchange for Carlos Santana on June 27.

With Kansas City, Mills produced a 4.79 ERA and 3.69 FIP with twice as many strikeouts as walks (20-to-10) over two stints and 19 appearances (20 2/3 innings) out of the Royals bullpen down the stretch this season. The 27-year-old lost his spot on the Royals’ 40-man roster when the club signed left-hander Ryan Yarbrough to a one-year, $3 million contract on Tuesday.

Listed at 6-foot-4 and 214 pounds, Mills possesses a sidearm delivery and operates with a three-pitch mix that consists of a low-90s four-seam fastball, a low-80s slider, and a low-90s sinker, per Baseball Savant. The Washington state native held opposing hitters to a .167 batting average against with his four-seamer (his most frequently-used offering) this year.

Mills has one minor-league option remaining and is not arbitration-eligible until 2026. He owns a lifetime 2.60 ERA over 62 1/3 career innings at the Triple-A level and figures to provide the Red Sox with some additional bullpen depth in 2023, if not beyond.

Going back to Kansas City in exchange for Mills is Wallace, the 24-year-old relief prospect the Red Sox originally acquired from the Rockies as the player to be named later in the August 2020 trade that sent Kevin Pillar to Colorado.

Wallace, who hails from Methuen, Mass., spent the entirety of the 2022 season with Double-A Portland. The right-hander out of UConn. forged a 3.81 ERA and 5.81 FIP with 76 strikeouts to 49 walks over 47 relief outings (56 2/3 innings) for the Sea Dogs. He was a candidate to be added to Boston’s 40-man roster last month, but was left off and was passed over in last week’s Rule 5 Draft. SoxProspects.com had Wallace as the No. 45 prospect in the organization, noting that his command and control need significant refinement.

Finally, we arrive at Hosmer, who was designated for assignment in order to make room for Mills on the 40-man roster. The Red Sox acquired Hosmer (as well as minor-leaguers Corey Rosier and Max Ferguson) from the Padres for pitching prospect Jay Groome in early August.

Hosmer appeared in just 14 games for Boston and batted .244/.320/.311 with three doubles, four RBIs, and six runs scored. The 33-year-old was placed on the injured list with low back inflammation on Aug. 21 and did not return until the final series of the season against the Rays.

While Hosmer was sidelined, the Red Sox called up top prospect Triston Casas from Triple-A Worcester. Casas, a left-handed hitting first baseman, slashed .197/.358/.408 with five home runs and 12 RBIs across 27 games (95 plate appearances) to close out the season. Considering the fact that Casas and Hosmer both hit from the left side of the plate and primarily play first base, the latter became somewhat redundant this offseason thanks to the former’s emergence in the fall.

The Red Sox will now have the next seven days to either trade, release, or waive Hosmer, who opted into the final three years and $39 million of his contract last month. As part of the deal that sent Hosmer from San Diego to Boston, though, the Padres agreed to pay the remainder of Hosmer’s salary down to the major-league minimum. That means that another club could claim Hosmer off waivers without needed to make much of a financial commitment to him moving forward.

Hosmer, who does not turn 34 until next October, did gain a full no-trade clause when he was dealt from the Padres to the Red Sox over the summer, so he would have to approve a move if Boston elects to trade him. The Red Sox could also elect to simply release Hosmer since the Padres remain on the hook for the bulk of his contract through 2025.

Following Friday’s series of moves, the Red Sox’ 40-man roster is now at full capacity.

(Picture of Wyatt Mills: Ed Zurga/Getty Images)

Which prospects did the Red Sox leave unprotected from next month’s Rule 5 Draft?

The Red Sox recently protected five of their prospects from the Rule 5 Draft. Chris Murphy, Brandon Walter, Ceddanne Rafaela, Wilyer Abreu, and David Hamilton were all added to Boston’s 40-man roster on Tuesday, meaning they will not be available to other teams next month.

Murphy, Walter, Rafaela, Abreu, and Hamilton represent five of the 70 Red Sox minor-leaguers who had been eligible for the 2022 Rule 5 Draft ahead of Tuesday’s protection deadline. Below are some of the notable omissions from the reserve list Boston submitted to Major League Baseball:

Thad Ward, RHP

Ward, 25, is currently regarded by MLB Pipeline as the No. 15 prospect in Boston’s farm system, ranking fifth among pitchers in the organization. The Red Sox originally selected the right-hander in the fifth round of the 2018 amateur draft out of the University of Central Florida. He showed signs of promise during his first full professional season, but did not pitch at all in 2020 due to the COVID-19 pandemic and then underwent Tommy John surgery last June.

Upon returning from Tommy John this season, Ward made six rehab starts in the lower-minors before re-joining Double-A Portland’s starting rotation in August. The 6-foot-3, 192-pound righty posted a 2.43 ERA with 41 strikeouts to 14 walks in seven starts (33 1/3 innings) for the Sea Dogs. He also pitched for the Scottsdale Scorpions of the Arizona Fall League, but was limited to just four appearances (12 2/3 innings) after suffering a left oblique strain in October.

Ward, who turns 26 in January, primarily operates with a low-90s fastball, a mid-80s slider, and a high-80s changeup. There is a very real chance he gets scooped up by another club.

Christian Koss, INF

Koss, 24 is currently regarded by MLB Pipeline as the No. 20 prospect in Boston’s farm system. The Red Sox originally acquired the infielder from the Rockies in December 2020 in exchange for left-hander Yoan Aybar. He spent the entirety of the 2022 season in Portland.

In 125 games with the Sea Dogs, the right-handed hitting Koss batted .260/.309/.430 with 22 doubles, five triples, 17 home runs, 84 RBIs, 69 runs scored, 16 stolen bases, 25 walks, and 137 strikeouts en route to being named the team’s Most Valuable Player. He saw playing time at five different positions, including both outfield corner spots for the first time in his professional career.

Koss, who also has a birthday in January, is now in Puerto Rico playing winter ball for the Criollos de Caguas. MLB Pipeline had identified the versatile 6-foot-1, 182-pounder as the Red Sox’ toughest Rule 5 decision, but the club ultimately decided on leaving him off the 40-man roster.

A trio of right-handed relievers

Ryan Fernandez — The 24-year-old hurler burst onto the scene to some degree this season. After compiling a 6.48 ERA with High-A Greenville through the end of May, Fernandez did not allow a run in his next nine outings and earned a promotion to Portland in early July. Unfortunately, elbow soreness limited him to just 10 outings with the Sea Dogs before his season ended in August. Prior to getting hurt, Fernandez had upped his fastball velocity from 92-95 mph to 96-98 mph while also mixing in a plus cutter, per SoxProspects.com’s Ian Cundall.

A.J. Politi — The 26-year-old righty made it to Triple-A Worcester in May after pitching to a 2.03 ERA to begin the season in Portland. With the WooSox, Politi posted a 2.41 ERA with 63 strikeouts to 19 walks over 38 appearances (two starts) spanning 56 innings of work. He held opponents to a .194 batting average against while operating with a fastball, cutter, and curveball.

Jacob Wallace — The 24-year-old was acquired from the Rockies as the player to be named later in the August 2020 trade that sent Kevin Pillar to Colorado. He spent all of this season in Portland and pitched to a 1.38 ERA in 19 relief appearances (26 innings) following the All-Star break. The Methuen, Mass. native possesses tantalizing stuff — including a high-octane fastball and a quality breaking ball — but his inability to command the strike zone can be concerning at times. Since he was left unprotected, a rebuilding team in need of bullpen help could look to pick Wallace up given the potential he has.

A young pitching prospect named Wikelman Gonzalez

Gonzalez, 20, is currently regarded by MLB Pipeline as the No. 14 prospect in Boston’s farm system, which ranks fourth among pitchers. The Red Sox originally signed the Venezuelan-born righty for $250,000 in July 2015. He posted a 4.21 ERA in 25 starts (98 1/3 innings) between Low-A Salem and Greenville this season. Only four of those 25 starts came with the Drive, so Gonzalez is still a ways away from garnering big-league consideration.

A pair of infielders in Eddinson Paulino and Brainer Bonaci

Paulino, 20, is currently ranked by MLB Pipeline as the No. 13 prospect in the Red Sox farm system. The left-handed hitter out of the Dominican Republic batted .266/.359/.469 with 35 doubles, 10 triples, 13 home runs, 66 RBIs, 96 runs scored, 27 stolen bases, 64 walks, and 105 strikeouts over 114 games (539 plate appearances) for Salem this season. He put up those numbers while seeing playing time at second base, shortstop, third base, center field, and left field.

Bonaci, also 20, is ranked by MLB Pipeline as Boston’s No. 16 prospect. The switch-hitting Venezuelan slashed .262/.397/.385 with 19 doubles, six triples, six homers, 50 runs driven in, 86 runs scored, 28 stolen bases, 88 walks, and 89 strikeouts across 108 games (494 plate appearances) with Salem. He, too, played second base, shortstop, third base, and right field.

Both Paulino and Bonaci are similar in that they were both signed by the Red Sox during the 2018 international signing period. They both have intriguing potential, but would probably struggle to stick on a big-league roster right now.

Other notable minor-leaguers left off: Cam Cannon, Brendan Cellucci, Kole Cottam, Nick Decker, Durbin Feltman, Ryan Fitzgerald, Devlin Granberg, Gilberto Jimenez, Victor Santos, Stephen Scott, Chase Shugart, and Ryan Zeferjahn.

The 2022 Rule 5 Draft will take place during the final day of the Winter Meetings in San Diego on December 7. A team that selects a player in the Rule 5 Draft must carry that player on their active roster for the entirety of the 2023 season (barring an injury) or would otherwise have to offer him back to his previous club for $50,000.

(Picture of Thad Ward: Jill Weisleder/MLB Photos via Getty Images)

Red Sox relief prospect Jacob Wallace ended his season by posting 1.38 ERA in final 19 appearances for Double-A Portland

In some respects, it was a tale of two seasons for Red Sox relief prospect Jacob Wallace.

After spending the entirety of the 2021 campaign with High-A Greenville, Wallace made the jump to Double-A Portland out of camp earlier this spring. The right-hander got off a tough start while going up more advanced competition, as he posted a 6.75 ERA in the month of April.

By the time the All-Star break arrived in late July, Wallace’s numbers had not improved much. Although he was holding opposing batters to a .191 batting average against, the 24-year-old was struggling with his command and walking nearly 22 percent of the batters he had faced to that point. That led to an ERA of 5.87 and a FIP of 5.96.

Maybe he worked on something or maybe he just took some time off. But whatever Wallace did over the course of the four-day summer break clearly worked.

From July 22 through the end of the regular season, Wallace pitched to a much-improved 1.38 ERA and 4.07 FIP to go along with 30 walks to 17 walks across 19 relief appearances spanning 26 innings of work. The free passes were still an issue to a certain extent, but the righty did manage to lower his walk rate down to 16.3 percent in the second half.

“I started off the year not doing so hot with the control,” Wallace told The Eagle-Tribune’s Mac Cerullo last month. “As much emphasis as there is always with it, I struggled a little bit. I was getting in my own head with my mechanics and beating myself out there, which haltered a good season right out of the gate. But I worked on it all year long and the mechanics kind of clicked, and that’s helped me get better control and keep the walks down.”

A native of Methuen, Mass., Wallace was originally selected by the Rockies in the third round of the 2019 amateur draft out of the University of Connecticut. The following September, the Red Sox acquired the local hurler as the player to be named later in the August 2020 trade that sent veteran outfielder Kevin Pillar to Colorado.

Listed at 6-foot-1 and 190 pounds, Wallace is described by SoxProspects.com as having “among the best raw stuff for a true relief prospect in the system, with the potential for two plus pitches.” Those two pitches — a high-90s fastball and mid-80s slider — are now complemented by a changeup and a cutter.

“I’m still getting the perfect location on it and trying to get it inside to lefties and away to righties and locating that really well, but overall feeling great throwing it,” Wallace said. “Just pure confidence going into the game knowing if [the catcher] puts down a cutter I’m going to throw it for a strike, swing and miss, whatever I need.”

Wallace, who does not turn 25 until next August, can become Rule 5-eligible this off-season if he is not added to Boston’s 40-man roster by the November deadline. Assuming he remains in the organization through the winter, it appears likely he will break camp with Triple-A Worcester in the spring.

“I’m going at my pace. I feel like what I’ve learned this year would have been lost on me if I’d just jumped up to Worcester early with a good start,” said Wallace. “I wouldn’t have grown as a player as much as I did this year sticking around in Portland. It’s honestly perfect that I haven’t moved up, and growing as a player down here and being able to really feel comfortable down here and gain that confidence, pitching against the Double-A guys because they’re good enough as it is. But I’m excited for that next step and that’s on the Red Sox to tell me when that’s the case.”

(Picture of Jacob Wallace: Kelly O’Connor/sittingstill.smugmug.com)

Is right-hander Jacob Wallace ‘the best pure relief prospect’ in the Red Sox’ farm system?

It has been roughly 18 months since the Red Sox traded veteran outfielder Kevin Pillar to the Rockies for a player to be named later in August 2020. Less than three weeks later, the trade was completed when Boston acquired pitching prospect Jacob Wallace from Colorado.

A former third-round draft pick of the Rockies in 2019, Wallace drew immediate interest from the Red Sox fanbase since he hails from Methuen, Mass. and played his college baseball at the University of Connecticut.

After making his organizational debut at fall instructs, Wallace entered last spring ranked by Baseball America as the No. 28 prospect in the Sox’ farm system. The right-handed reliever broke minor-league camp with High-A Greenville, though he did not get off to the best of starts.

In his first 27 appearances out of the bullpen for the Drive, Wallace struggled to the tune of a 7.96 ERA and 5.66 FIP to go along with 43 strikeouts to 19 walks over 31 2/3 innings of work.

That miserable stretch lasted from May 5 through Aug. 1. Four days later, it was almost as if a flip had switched for Wallace when he punched out four of the six batters he faced in two scoreless frames against the Rome Braves at Fluor Field.

From that point on, the 23-year-old seemingly turned his 2021 around for the better by posting a 2.12 ERA and miniscule 1.12 FIP while recording 33 strikeouts to just six walks across his final 12 outings (17 innings pitched) of the year.

Most notably, Wallace made some history when he tossed the ninth and final inning of a combined no-hitter against the Asheville Tourists on September 2. Jeremy Wu-Yelland had started that contest and hurled five shutout frames, while Jose Espada Oddanier Mosqueda combined for three scoreless innings before Wallace closed out a 6-0 victory for Greenville.

Among High-A East pitchers who accrued at least 40 innings on the mound last season, Wallace ranked sixth in strikeouts per nine innings (14.05), 10th in strikeout rate (34.5%), and fourth in swinging strike rate (18.5%), per FanGraphs.

While Wallace was clearly among the top strike throwers at the High-A level in 2021, the righty still seemed to struggle with his control to some degree. His 4.62 walks per nine innings and 11.4% walk rate last year are indicators of that.

Listed at 6-foot-1 and 190 pounds, Wallace utilizes a unique delivery and operates with a three-pitch mix that consists of a 96-98 mph fastball, an 84-86 mph slider, and a slider that he added after turning pro, according to his SoxProspects.com scouting report.

Along those same lines, SoxProspects.com’s director of scouting Ian Cundall tweeted on Monday that he believes Wallace is “the best pure relief prospect in the system” and “could move quick if he can build on his end to 2021.”

Wallace, who does not turn 24 until August, is currently projected by SoxProspects.com to begin the 2022 minor-league season with Double-A Portland. The hard-throwing hurler can become eligible for the Rule 5 Draft for the first time in his career next winter, so the Red Sox would need to add him to their 40-man roster by late November if they want to prevent that from happening.

(Picture of Jacob Wallace courtesy of the Greenville Drive)