Tom Cosgrove - MLB News, Rumors, & Updates

Assigned to Triple-A Cosgrove was assigned to Triple-A Rochester on Friday after clearing outright waivers.

Impact Cosgrove will stay in the Nationals' organization in the minors after being designated for assignment Wednesday. Across 30 appearances in Triple-A this season, Cosgrove has a 4.15 ERA, 1.42 WHIP and 32:22 K:BB over 30.1 innings.

SEPTEMBER 4 • ROTOWIRE

Jettisoned from 40-man roster The Nationals designated Cosgrove for assignment Wednesday.

Impact Cosgrove had allowed three runs in consecutive appearances and given up 13 runs (11 earned) over his last 5.2 innings. There's a good chance the lefty reliever will clear waivers.

SEPTEMBER 2 • ROTOWIRE

Blows save Sunday Cosgrove was charged with a blown save in Sunday's 6-2 loss to the Marlins. He allowed three runs on a hit and a walk across two-thirds of an inning.

Impact After Max Kranick loaded the bases with one out in the ninth, the Nationals turned to Cosgrove, who promptly poured gasoline on the fire -- the southpaw hit the first batter he faced, forcing in a run to cut Washington's lead to 2-1, before ultimately giving up a two-run homer to Otto Lopez, capping a six-run frame. After allowing just three runs in his first 10.2 innings with the Nats this year, Cosgrove's struggled to an ugly 17.47 ERA across 5.2 innings in his last seven appearances.

AUGUST 30 • ROTOWIRE

Lopez homer caps six-run ninth as Marlins rally past Nationals 6-2

Otto Lopez’s two run homer capped a six-run ninth inning and the Miami Marlins rallied past the Washington Nationals 6-2 on Sunday

AUGUST 30 • Associated Press

Daylen Lile homers as Nationals top Rockies 7-1 to split 4-game series

Daylen Lile homered and drove in two runs as part of a three-hit day, and the Washington Nationals beat the Colorado Rockies 7-1 to split their four-game series

AUGUST 27 • Associated Press

Javier Sanoja singles with bases loaded in 9th to give the Marlins a 3-2 win over the Nationals

Javier Sanoja singled through the middle with the bases loaded and no out in the ninth inning to give the Miami Marlins a 3-2 victory over the Washington Nationals on Friday night

AUGUST 22 • Associated Press

Alex Bregman's first career 3-homer game helps Cubs rout Nationals 12-6

Alex Bregman hit three homers in a game for the first time and drove in a career-high seven runs as the Chicago Cubs routed the Washington Nationals 12-6

AUGUST 13 • Associated Press

Credited with first save Cosgrove picked up the save Monday against Colorado. He did not record a strikeout over two perfect innings.

Impact Cosgrove entered with a three-run cushion in the eighth inning and fired off two perfect frames for his first save of the season, with Washington pushing its lead to four runs in the ninth.Since having his contract selected July 10, the southpaw has logged 4.2 scoreless innings with a 4:1 K:BB across four appearances. In a shaky Nationals bullpen, Cosgrove could continue to earn high-leverage opportunities if he maintains this strong form.

JULY 21 • ROTOWIRE

Chapparo, Young and Abrams homer in Nationals' 7-3 win over Rockies

Andrés Chaparro, Jacob Young and CJ Abrams homered to lead the Washington Nationals past the Colorado Rockies 7-3

JULY 21 • Associated Press

Contract selected The Nationals selected Cosgrove's contract from Triple-A Rochester on Friday, Spencer Nusbaum of The Athletic reports.

Impact Cosgrove was just acquired via trade from the Astros last week and is now joining up with the big club. The lefty reliever has logged a 4.15 ERA and 32:22 K:BB across 30.1 innings of work at the Triple-A level this season.

JULY 10 • ROTOWIRE

Shipped to Nationals The Astros traded Cosgrove to the Nationals on Friday in exchange for cash, Brian McTaggart of MLB.com reports.

Impact Cosgrove has spent the entire season with Houston's Triple-A affiliate, turning in a 4.30 ERA and 1.44 WHIP to go with a 29:21 K:BB through 29.1 innings. He didn't own a spot on the 40-man roster with the Astros, so he'll slot in as bullpen depth at Triple-A Rochester to begin his tenure with the Nats.

JULY 4 • ROTOWIRE

Fails to win Opening Day spot The Astros reassigned Cosgrove to minor-league camp Sunday, Brian McTaggart of MLB.com reports.

Impact Cosgrove is expected to serve as organizational bullpen depth at Triple-A Sugar Land to begin the season after he was unable to secure a spot in the Astros' Opening Day bullpen. The 29-year-old lefty joined Houston on a minor-league deal over the winter after he spent time in the Padres and Cubs organizations in 2025 and made just two relief appearances at the big-league level.

MARCH 15 • ROTOWIRE

Signs with Astros Cosgrove signed a minor-league deal with the Astros on Thursday, which includes an invitation to spring training, Jon Heyman of the New York Post reports.

Impact Cosgrove has pitched primarily at Triple-A for the last two seasons, working a total of 18.2 innings in the majors. He'll have the chance to battle for a roster spot during spring training.

JANUARY 30 • ROTOWIRE

Remains in organization The Cubs outrighted Cosgrove to Triple-A Iowa on Wednesday.

Impact He's no longer on the 40-man roster, but Cosgrove will remain in the organization after passing through waivers unclaimed. The lefty reliever has spent most of 2025 at Iowa, holding a 4.71 ERA, 1.60 WHIP and 51:25 K:BB over 42 innings.

SEPTEMBER 4, 2025 • ROTOWIRE

Pushed off 40-man roster The Cubs designated Cosgrove for assignment Sunday.

Impact Cosgrove will give up his spot on the 40-man roster to right-hander Aaron Civale, whom the Cubs claimed off waivers from the White Sox on Sunday. Before being optioned to Triple-A Iowa on Aug. 19, Cosgrove made two relief appearances for the Cubs this season, giving up one earned run on three hits and one walk over four innings. His results over a larger sample of 42 innings at Iowa were far less impressive (4.71 ERA, 1.60 WHIP, 51:25 K:BB), however, and the 29-year-old lefty could go unclaimed off waivers as a result.

AUGUST 31, 2025 • ROTOWIRE

Returns to Triple-A The Cubs optioned Cosgrove to Triple-A Iowa on Tuesday.

Impact The left-hander was called up ahead of Game 1 of Tuesday's doubleheader and will return to the minors after not appearing in the matinee. Cosgrove has made just two appearances in the majors this season and has a 4.66 ERA across 38.2 relief innings at Triple-A.

AUGUST 19, 2025 • ROTOWIRE

Returns to Triple-A The Cubs optioned Cosgrove to Triple-A Iowa on Tuesday.

Impact The left-hander was called up ahead of Game 1 of Tuesday's doubleheader and will return to the minors after noting appearing in the matinee. Cosgrove has made just two appearances in the majors this season and has a 4.66 ERA across 38.2 relief innings at Triple-A.

AUGUST 19, 2025 • ROTOWIRE

Joins big club for doubleheader The Cubs recalled Cosgrove from Triple-A Iowa on Tuesday, Maddie Lee of the Chicago Sun-Times reports.

Impact Cosgrove will join the Cubs ahead of Tuesday's doubleheader with the Brewers, though it's unclear if he or another player will be sent back to Iowa once the twin bill concludes and Chicago needs to reduce its active roster to 26 men. The 29-year-old southpaw reliever has made just two appearances in the majors this season but has seen ample usage for Iowa, logging a 4.66 ERA and 1.65 WHIP while striking out 47 batters across 38.2 innings over 33 outings.

AUGUST 19, 2025 • ROTOWIRE

Sent back to minors The Cubs optioned Cosgrove to Triple-A Iowa on Saturday, Taylor McGregor of Marquee Sports Network reports.

Impact Cosgrove was brought up from the minors Friday to replace Caleb Thielbar (paternity) but will now head back to Iowa to clear space on the active roster for Cade Horton. Cosgrove has given up just one run in four innings with the Cubs this season and is a candidate to return to Chicago later in the year whenever the big club needs a fresh bullpen arm.

MAY 10, 2025 • ROTOWIRE

RHP Cade Horton likely to make big league debut with the Chicago Cubs on Saturday

Cade Horton is expected to take the mound for the Chicago Cubs on Saturday for his anticipated major league debut

MAY 9, 2025 • Associated Press

Recalled from Triple-A The Cubs recalled Cosgrove from Triple-A Iowa on Friday, Maddie Lee of the Chicago Sun-Times reports.

Impact Cosgrove takes the roster spot of Caleb Thielbar, who was placed on the paternity list Friday. Cosgrove appeared in one game for the Cubs earlier this season, tossing two scoreless innings of relief, striking out a pair and walking one.

MAY 9, 2025 • ROTOWIRE

Chris Flexen brought up to majors by Chicago Cubs after spending last season with White Sox

Chris Flexen was brought up to the major leagues by the Chicago Cubs after signing a minor league contract in February and making five minor league starts

APRIL 30, 2025 • Associated Press

Optioned to Triple-A The Cubs optioned Cosgrove to Triple-A Iowa on Wednesday, Taylor McGregor of Marquee Sports Network reports.

Impact Cosgrove made one appearance during his brief time with the Cubs, tossing two scoreless innings. His roster spot is being absorbed by Chris Flexen.

APRIL 30, 2025 • ROTOWIRE

Cubs recall left-hander Tom Cosgrove from Triple-A Iowa

The Chicago Cubs have recalled left-hander Tom Cosgrove from Triple-A Iowa

APRIL 27, 2025 • Associated Press

Recalled by Cubs The Cubs recalled Cosgrove from Triple-A Iowa on Sunday.

Impact Cosgrove started the season with the Padres but was traded to the Cubs on April 10. He hasn't allowed a run over four innings in Triple-A while logging seven strikeouts, and he'll move to the majors to provide left-handed depth out of the Cubs' bullpen. Ethan Roberts was optioned to Iowa in a corresponding move.

APRIL 27, 2025 • ROTOWIRE

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Lopez homer caps six-run ninth as Marlins rally past Nationals 6-2

Daylen Lile homers as Nationals top Rockies 7-1 to split 4-game series

Javier Sanoja singles with bases loaded in 9th to give the Marlins a 3-2 win over the Nationals

Alex Bregman's first career 3-homer game helps Cubs rout Nationals 12-6

Chapparo, Young and Abrams homer in Nationals' 7-3 win over Rockies

RHP Cade Horton likely to make big league debut with the Chicago Cubs on Saturday

Chris Flexen brought up to majors by Chicago Cubs after spending last season with White Sox

Cubs recall left-hander Tom Cosgrove from Triple-A Iowa