MLB League Transactions - Free Agent Signings, Player Trades & More

McCormick, a left fielder for the Astros, appeared in 66 games this season with 28 starts, posting a .210 average, .279 OBP, .290 SLG, and .569 OPS. In his last 30 games, he hit .200 with 14 hits in 70 at-bats, including 4 doubles, 1 home run, and 5 RBIs.

Jacques was traded to the Mariners from the Dodgers on June 2, 2025. The Mariners selected his contract on July 2, 2025, before optioning him to the minors on July 3, 2025. Jacques has not appeared in any games this season.

Castillo, recently designated for assignment by the Mets, has been claimed and optioned by the Mariners. Over 21 games in 2025, Castillo logged a 4.98 ERA with 22 strikeouts across 21 2/3 innings. The Mariners face the Tampa Bay Rays on September 3, 2025, at George M. Steinbrenner Field.

Baker made his MLB debut on September 1, 2024, with the Nationals. He has not appeared in any games during the 2025 regular season. The Nationals optioned Baker to the minor leagues on March 17, 2025, before his recent designation for assignment.

Montero's 2025 season includes 15 games with 9 starts, compiling a 4-3 record, 4.66 ERA, and 53 strikeouts over 73 1/3 innings. He was optioned on July 26, 2025, after a loss against the Blue Jays where he allowed 5 earned runs in 4 innings. The Tigers face the Mets next at Comerica Park on September 3, 2025.

Across 33 games this season, Richardson has pitched 36 2/3 innings with an ERA of 4.17, a WHIP of 1.47, and 30 strikeouts against 20 walks. The Reds host the Toronto Blue Jays on September 3, 2025, at Great American Ball Park.

Contreras made one appearance for the Orioles this season, pitching 4 1/3 innings with an ERA of 0.00 and a WHIP of 0.92, recording 2 strikeouts and 1 walk. He was previously designated for assignment by Baltimore on August 28, 2025, before being claimed by Colorado. The Rockies will face the San Francisco Giants at Coors Field on September 3, 2025, at 8:40 PM.

Booser's 2025 season includes 35 games, 28 innings pitched, a 4.82 ERA, and 33 strikeouts against 18 walks. The White Sox face the Minnesota Twins away at Target Field on September 3, 2025, at 7:40 PM.

Alfaro, a right-handed catcher, has not appeared in any games this season. Released by the Brewers on September 1, 2025, he joined the Nationals' minors system shortly after. Washington's next game is against the Marlins at Nationals Park on September 3, 2025, at 1:05 PM.

Gipson-Long made his MLB debut on September 10, 2023. In the 2025 season, he has pitched in 6 games, starting 2, with 25 innings pitched, a 4.32 ERA, 1.04 WHIP, 20 strikeouts, and 4 walks. Detroit faces the New York Mets next at Comerica Park on September 2, 2025, at 6:40 PM.