Which pitching prospect did Red Sox trade to Cardinals for Sonny Gray?

The Red Sox swung a significant trade with the Cardinals on Tuesday, acquiring veteran starter Sonny Gray and cash considerations for right-hander Richard Fitts, minor league left-hander Brandon Clarke, and a player to be named later or cash considerations.

This article will focus on Clarke, who was ranked by MLB Pipeline as Boston’s No. 5 prospect and is now the No. 7 prospect in St. Louis’ farm system.

Clarke was selected by the Red Sox in the fifth round (148th overall) of the 2024 draft out of State College of Florida, Manatee-Sarasota. The Virginia native had been committed to transferring to South Carolina for his senior season before signing with Boston for an under-slot $400,000 last July.

Clarke did not make his professional debut until he broke camp with Low-A Salem to begin the 2025 campaign. On the heels of an eye-opening spring training, the 22-year-old lefty dominated Carolina League hitters to the tune of a 0.93 ERA (0.98 FIP) with 17 strikeouts to just two walks in three starts (9 2/3 innings). He was then rewarded with a promotion to High-A Greenville in late April.

Upon making the jump to the hitter-friendly South Atlantic League, Clarke saw his stock rise even further as he vaulted into the back end of Baseball America’s Top 100 prospects list for a brief period. After tossing 4 2/3 scoreless innings against Bowling Green on May 24, however, Clarke was sidelined for the next month-plus with a blister caused by a hangnail.

Clarke returned to the mound in late June but struggled for the most part over the summer before being shut down again in August due to a recurrence of blisters. He ended the season on Greenville’s injured list, having posted a 5.08 ERA (4.17 FIP) with 43 strikeouts to 25 walks in 11 starts (28 1/3 innings) for the Drive.

Overall, Clarke forged a 4.03 ERA (3.36 FIP) with 60 strikeouts to 27 walks over 14 total starts (38 innings) between Salem and Greenville in 2025. Opposing hitters batted just .128 against him altogether, though struggles with command and control (as indicated by his 15.5 percent walk rate) generated concerns about his outlook moving forward.

Even with those concerns, there is no doubting the potency of Clarke’s stuff. The 6-foot-4, 220-pound southpaw primarily operates with an upper-90s fastball (both two- and four-seam) that can reach triple-digits, an 87-90 mph slider, an 81-85 mph sweeper, and an 87-89 mph changup.

“In terms of pure talent, what’s coming out of his hand and the [arm] extension he gets, it’s right up there with anybody in the minor leagues,” Cardinals president of baseball operations (and former Red Sox chief baseball officer) Chaim Bloom said of Clarke. “You really could put him on that short list of highest talent/most upside in the minor leagues.”

Clarke, who turns 23 in April, seems likely to open the 2026 season with the Cardinals’ High-A affiliate in Peoria, Ill. If he can stay healthy and further harness his command and control, he has tremendous upside as a starter. If not, he still projects as a reliever at the big league level in the long term.

(Picture of Sonny Gray: Dilip Vishwanat/Getty Images)

Red Sox LHP prospect Brandon Clarke ‘unlikely to pitch again this year’ due to recurrence of blisters

Red Sox pitching prospect Brandon Clarke was placed on High-A Greenville’s 7-day injured list on Friday due to a recurrence of blisters and is unlikely to pitch again this year as a result, according to The Boston Globe’s Alex Speier.

Clarke is currently regarded by Baseball America as Boston’s No. 7 prospect, which ranks fourth among pitchers in the organization. The 22-year-old left-hander was selected in the fifth round (148th overall) of last summer’s draft out of State College of Florida, Manatee-Sarasota. He forwent his commitment to transfer to South Carolina by signing with the Red Sox for an under-slot $400,000, but did not make his professional debut until April.

On the heels of an impressive spring training, Clarke broke camp with Low-A Salem and dominated Carolina League hitters to the tune of a 0.93 ERA (0.94 FIP) with 17 strikeouts to two walks in three starts (9 2/3 innings) to open the season. He received a promotion to Greenville in late April and produced solid results through the end of May, resulting in his vaulting into the back end of Baseball America’s Top 100 prospects list. After tossing 4 1/3 scoreless frames against Bowling Green on May 24, however, he missed the next month-plus due to a blister caused by a hangnail.

Upon returning to the mound on June 26, Clarke struggled to a 7.71 ERA (5.42 FIP) in seven starts (14 innings) before being placed on Greenville’s injured list. Overall, he has posted a 5.08 ERA (4.20 FIP) with 43 strikeouts to 25 walks across 11 outings (28 1/3 innings) for the Drive. Opposing South Atlantic League hitters have batted .150 against him.

If Clarke is indeed done for the year, he will wrap up his first pro season having forged a 4.03 ERA (3.37 FIP) with 60 strikeouts to 27 walks in 14 starts (38 innings) between Salem and Greenville. That translates to a 34.5 percent strikeout rate, a 15.5 percent walk rate for the 6-foot-4, 220-pound southpaw, who regularly reached 98-99 mph with his upper-90s fastball while incorporating an 87-90 mph slider, 81-85 mph sweeper, and an 87-89 mph changeup into his arsenal.

(Picture of Brandon Clarke: Kelly O’Connor/sittingstill.smugmug.com)

Red Sox to promote prospects Franklin Arias, Brandon Clarke to High-A Greenville

The Red Sox are promoting infield prospect Franklin Arias and pitching prospect Brandon Clarke from Low-A Salem to High-A Greenville, as was first reported by Andrew Parker of Beyond the Monster.

Arias, 19, is currently regarded by Baseball America as the No. 4 prospect in Boston’s farm system and the No. 72 prospect in the sport. The right-handed hitter batted a stout .346/.407/.397 with four doubles, nine RBIs, 15 runs scored, four stolen bases, six walks, and 12 strikeouts in 19 games (86 plate appearances) for Salem to open the season. He did not play in Sunday’s series finale against Hickory.

Among 93 qualified hitters in the Carolina League coming into play on Sunday, Arias ranked third in swinging-strike rate (6.1 percent), sixth in batting average, 11th in strikeout rate (14 percent), 13th in line-drive rate (29.2 percent), 21st in on-base percentage, 29th in wOBA (.401), 30th in OPS (.804), 34th in slugging percentage and wRC+ (128), and 46th in speed score, per FanGraphs.

On the other side of the ball, Arias has seen the vast majority of his playing time to this point in the season come at shortstop. With Salem, the 5-foot-11, 170-pounder logged 135 1/3 innings at short, where he committed just one error in 70 defensive chances. He also made one start at second base and two starts at DH.

A native of Venezuela, Arias originally signed with the Red Sox for $525,000 as an international free agent coming out of Caracas in January 2023. He put forth a strong professional debut in the Dominican Summer League that season, then caught fire in the Florida Complex League last year. To go along with being named the FCL’s 2024 MVP and top prospect, he was rewarded with a promotion to Salem in late July and was later recognized as Boston’s Minor League Baserunner of the Year.

“I definitely want to be the best player I can be. [But] I try to take it day to day and try not to look too far in the future,” Arias told The Boston Globe’s Alex Speier (through a translator) earlier this month. “I feel that’s what helped me get that MVP last year, and I think if I can take that day-to-day approach this year, I can have some similar results.”

Arias, who does not turn 20 until November, also told Speier that he is aiming to make it to Double-A Portland or even Triple-A Worcester before his age-19 season draws to a close. If he were to receive a promotion to Portland at some point this winter or fall, he would join Roman Anthony (2023) and Xander Bogaerts (2012) as the two most recent Red Sox prospects to reach the Double-A level as teenagers.

In Greenville, Arias is slated to join a middle infield mix that already includes the likes of Marvin Alcantara, Nazzan Zanetello, Fraymi De Leon, and Justin Riemer (on the injured list). It would not be terribly surprising if he emerged as the Drive’s primary shortstop moving forward, though he could spend additional time at second base to get others reps at short.

Clarke, meanwhile, is not yet ranked by Baseball America as one of Boston’s top pitching prospects, though that will likely be changing soon. The 22-year-old left-hander was selected by the Red Sox in the fifth round (148th overall) of last summer’s draft out of State College of Florida, Manatee-Sarasota. He forewent his commitment to transfer to South Carolina by signing for $400,000, but did not pitch for an affiliate after putting pen to paper.

Clarke, instead, waited until April 10 of this year (his 22nd birthday) to make his professional debut. The Virginia native then posted a 0.93 ERA (1.20 FIP) with 17 strikeouts to just two walks in his first three starts (9 2/3 innings) for Salem. He only gave up two hits in that stretch as two of his three outings to kick off the 2025 campaign were both scoreless and hitless.

Among the 118 Caroline League pitchers who entered Sunday with at least nine innings under their belts early on, Clark ranked first in FIP and xFIP (1.55), second in strikeout rate (47.2 percent) and groundball rate (68.8 percent), batting average against (.061), and WHIP (0.41), third in line-drive rate (6.3 percent) and swinging-strike rate (21.3 percent), 13th in ERA, and 17th in walk rate (5.6 percent), per FanGraphs.

Listed at 6-foot-4 and 220 pounds, Clarke stood out in spring training not just because of his large stature, but because of his arsenal as well. As highlighted in his SoxProspects.com scouting report, the athletic lefty throws from a three-quarters arm slot and incorporates a high leg kick into his delivery. He operates with a four-pitch mix that consists of a 96-99 mph fastball that tops out at 100 mph, an 87-90 mph slider, an 81-85 mph sweeper, and an 87-89 mph changeup that is still considered a work in progress.

Much like Arias, Clarke is in line to face more advanced competition at the High-A level with this promotion. Presumably taking the place of fellow southpaw Hayden Mullins (promoted to Portland) in Greenville’s starting rotation, Clarke will join a talented pitching staff headed by 2024 second-round draft pick Payton Tolle, Juan Valera, and Jedixson Paez. He will likely make his Drive debut in the team’s upcoming series against the Asheville Tourists at Fluor Field.

(Picture of Franklin Arias: Joe Robbins/Icon Sportswire via Getty Images)