Red Sox pitching prospect Max Carlson has several ‘traits teams look for in a major-league reliever’

In the 12th round of last year’s draft, the Red Sox selected North Carolina right-hander Max Carlson.

Taken with the 358th overall pick, Carlson signed with Boston for $150,000 and marked his professional debut by making one scoreless relief appearance in the Florida Complex League shortly thereafter. He then broke camp with Low-A Salem for the start of his first full pro season earlier this spring.

Carlson appeared in three of Salem’s first 11 games, allowing seven runs (five earned) over 8 1/3 innings, before being elevated to High-A Greenville on April 20. However, that assignment would prove to be short-lived, as Carlson was sent back to Salem three days later after pitching in just one game for the Drive.

For the better part of the next four months, Carlson established himself as a key member of Salem’s bullpen. From April 25 through the MLB All-Star break in July, the righty posted a 1.34 ERA with 45 strikeouts to 11 walks over 17 appearances (33 2/3 innings). Opposing hitters batted just .198 against him in that stretch.

Though he struggled some upon returning from the break, most notably surrendering a season-worst six earned runs to Carolina on July 27, Carlson pitched well enough to earn another promotion to the High-A level on August 20. He then closed out the 2024 campaign by producing a 1.80 ERA in four appearances (10 innings) for Greenville. That includes tossing a season-high five frames of one-run ball in his final outing of the year against Winston-Salem on September 6.

Altogether, Carlson forged a 2.73 ERA and 2.41 FIP with 86 strikeouts to 23 walks in 33 total relief appearances (69 1/3 innings) between Salem and Greenville in 2024. Among the 39 Red Sox minor-leaguers who threw at least 65 innings this year, Carlson ranked first in FIP, second in ERA and swinging-strike rate (17.2 percent), third in xFIP (3.13), ninth in strikeouts per nine innings (11.16) and walks per nine innings (2.99), 10th in walk rate (7.7 percent), 11th in strikeout rate (28.9 percent), and 17th in WHIP (1.27), per FanGraphs.

Carlson, who turned 23 in September, was recognized as a 2024 SoxProspects.com All-Star last month. The Minnesota native is currently regarded by the outlet as the No. 42 prospect in Boston’s farm system, which ranks 23rd among pitchers in the organization.

Though he is not ranked among Boston’s top farmhands by publications such as Baseball America at the moment, Carlson was identified by BA’s Geoff Pontes as a pitching prospect with “elite” traits on his four-seam fastball earlier this summer.

“Carlson only sits 91-92 mph but has over seven feet of extension, above-average vertical break, and arm-side run, allowing his fastball to play above its below-average velocity,” Pontes wrote in August. “It’s a classic three-quarters arm slot, but the release and plane on the pitch play up due to his combination of extension and spin efficiency.”

In addition to throwing a fastball that can touch 95 mph, Carlson operates with a 79-81 mph changeup that has “late fade” and a 79-82 mph sweeping slider “that lacks depth at times,” per his SoxProspects.com scouting report, which notes that the 6-foot-1, 190-pound hurler has several traits “teams look for in a major-league reliever that could make him a more interesting bullpen prospect.”

To that end, Carlson — assuming he remains in the organization through the winter — is projected by SoxProspects.com to return to Greenville as a member of the Drive’s bullpen to start the 2025 minor-league season.

(Picture of Max Carlson: Kelly O’Connor/sittingstill.smugmug.com)

Red Sox select North Carolina righty Max Carlson with 12th-round pick in 2023 MLB Draft

The Red Sox have selected North Carolina right-hander Max Carlson with their 12th-round pick in the 2023 MLB Draft at No. 358 overall.

Carlson was regarded by Baseball America as the No. 385 prospect in this year’s draft class. The 21-year-old junior posted a 5.45 ERA and 1.39 WHIP with 76 strikeouts to 32 walks in 17 appearances (14 starts) spanning 76 innings of work for the Tar Heels this past season. Opposing hitters batted .256 against him.

Listed at 6-foot-1 and 210 pounds, Carlson “pitches in the 90-93 mph range and touches 95, and uses a low-80s changeup as his primary secondary and swing-and-miss pitch,” per his Baseball America scouting report. “He generated a 40% miss rate with the changeup this spring, which was far and away his most effective bat-missing offering. He’ll also mix in a low-80s slider, but he used the pitch at just a 7% rate.”

The younger brother of Mariners minor-league righty Sam Carlson, Max was a well-regarded pitching prospect coming out of high school but was not drafted in 2020. The Minnesota native instead took his talents to Chapel Hill and had the best year of his collegiate career as a sophomore, pitching to a 3.71 ERA over 18 starts (77 2/3 innings) in 2022.

Though his production took a dip this spring, the Red Sox still elected to take a chance on Carlson, who turns 22 in September. He is the first pitcher taken by Boston on Day 3 and the seventh arm drafted by the club overall.

As is the case with most prospects who are drafted between rounds 11-20, the Red Sox can sign Carlson for up to $150,000 without it counting toward their bonus pool. Carlson does still have eligibility remaining, so he could return to North Carolina for his senior season if he so chooses.

(Picture of Max Carlson: Eakin Howard/Getty Images)