Even though he was not signed until late April, pitching prospect Danny Kirwin still put together an impressive first season as a member of the Red Sox organization.
After going undrafted out of Rider University (Lawrence Township, N.J.) in 2023, Kirwin pitched in two summer leagues before signing with the Oakland Ballers that December. The right-hander originally planned on spending the 2024 season with the newly formed Pioneer League club. He instead became the first player in the team’s short history to have his contract purchased by a major-league organization when the Red Sox did so last April.
That came shortly after Ballers manager Micah Franklin posted a 45-second video on social media of Kirwin reaching 98 mph with his fastball during a bullpen session. The Red Sox, as it turned out, caught wind of the post and wasted little time in getting Kirwin to Fort Myers, Fla. for a physical and to sign a contract. He officially put pen to paper on April 24 and reported to Low-A Salem the following day.
Kirwin, who turned 25 in November, spent the remainder of the minor-league season with Boston’s Carolina League affiliate. In 20 appearances (five starts) for the Salem Red Sox, the righty posted a 3.63 ERA (3.65 FIP) with 69 strikeouts to 24 walks over 69 1/3 innings. Opposing hitters batted just .211 against him.
Among the 57 pitchers who threw at least 65 innings in the Carolina League last year, Kirwin ranked seventh in groundball rate (46.8 percent), 13th in batting average against, 18th in WHIP (1.13), 19th in xFIP (3.48), 21st in swinging-strike rate (13.4 percent), 24th in FIP, 25th in walks per nine innings (3.12), and 26th in walk rate (8.4 percent) and line-drive rate (21.5 percent), per FanGraphs.
While Salem’s season ended in early September, Kirwin’s year continued in the Arizona Fall League. One of eight Boston minor-leaguers to make the trek out west, Kirwin was recognized as an AFL All-Star after forging a 2.84 ERA with 16 strikeouts to just one walk in five appearances (one start) spanning 12 2/3 innings for the Mesa Solar Sox.
Between his stints with Salem and in Arizona last season, Kirwin flashed some intriguing stuff on the mound. Throwing from a low three-quarters arm slot, the 6-foot-2, 205-pound hurler typically sat in the upper-90s with his high-octane fastball while also featuring a low-90s cutter and sinker, a mid-80s sweeper that he changed the grip on late into the year, and an upper-80s changeup.
A native of Lansdale, Penn., Kirwin returned to and spent part of his offseason training at Tread Athletics in Pineville, N.C. to further revamp his arsenal and mechanics. He recently debuted as SoxProspects.com’s 59th-ranked Red Sox prospect (29th among pitchers) and is currently projected by the site to open the 2025 campaign in High-A Greenville’s bullpen.
(Picture of Danny Kirwin: Norm Hall/MLB Photos via Getty Images)