Minor League Baseball

Boston Red Sox Triple-A Affiliate Releases Veteran Pitcher After Long Road to Recovery

Wyatt Mills finally took the mound for the Worcester Red Sox in 2025, only to get cut loose with seven weeks left in the minor league season.
Sam Connon|
Wyatt Mills, a non-roster invitee pitcher for the Boston Red Sox throws at JetBlue Park at Fenway South.
Wyatt Mills, a non-roster invitee pitcher for the Boston Red Sox throws at JetBlue Park at Fenway South. | Andrew West/The News-Press/USA Today Network / USA TODAY NETWORK via Imagn Images

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Boston Red SoxKansas City RoyalsSeattle Mariners

The Worcester Red Sox have released right-handed pitcher Wyatt Mills, according to the team's official transaction log.

Mills had taken the mound 32 times for the Boston Red Sox's Triple-A affiliate in 2025, making seven starts and 25 relief appearances. He was 4-2 with 3.12 ERA, 1.288 WHIP and 8.5 strikeouts per nine innings.

But with Cooper Criswell getting bumped off the MLB roster after one spot start, Worcester had to part ways with another pitcher. That turned out to be Mills, a 30-year-old righty with big league experience of his own.

Mills was the Seattle Mariners' third round pick in the 2017 MLB Draft. He made his major league debut in 2021, when he was ranked as the No. 22 prospect in Seattle's organizaiton.

The Mariners ultimately traded Mills and minor league pitcher William Fleming to the Kansas City Royals for Carlos Santana midway through the 2022 campaign. Mills got flipped to the Red Sox six months later, only to undergo Tommy John surgery, miss all of 2023 and get non-tendered at the end of the season.

Boston brought Mills back on a two-year minor league deal, waiting out his recovery until he finally took the mound again in spring training. He notched one hold and two saves in Grapefruit League action, posting a 3.00 ERA and 1.167 WHIP.

Mills is 0-1 with a 6.21 ERA, 1.548 WHIP, 7.9 strikeouts per nine innings and a -0.3 WAR in his MLB career. Down in Triple-A, meanwhile, he is 11-5 with a 2.83 ERA, 1.128 WHIP and 11.0 strikeouts per nine innings.

The veteran is now a minor league free agent.

Related MiLB Stories

  • MIA-MIL TRADE: One day after they sent John Rooney to the Houston Astros, the Miami Marlins shed another relief pitcher from their farm system by trading Austin Roberts to the Milwaukee Brewers. CLICK HERE
  • BARNES BACK TO FA: After the Los Angeles Dodgers let him go earlier this season, the San Francisco Giants elected to release catcher Austin Barnes from his minor league contract. CLICK HERE
  • CAMPEBLL HEATING UP: Kristian Campbell could soon return to the big leagues if he continues to mash for the Worcester Red Sox, considering his 13-game hitting streak is the team's best all year. CLICK HERE

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Sam Connon
SAM CONNON

Sam Connon is a staff writer for “Minor League Baseball on SI’’ and other "On SI'' baseball sites. He previously covered UCLA Athletics for “UCLA on SI’’ and won awards from the College Media Association and Society of Professional Journalists. Connon also wrote for “New England Patriots on SI’’ and was on the Patriots and Boston Red Sox beats at Prime Time Sports Talk. Follow Sam on Twitter @SamConnon.

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