Sean Newcomb’s time with the Red Sox has come to an end.

The Red Sox announced Tuesday that they have traded the former Middleborough High standout to the Athletics in exchange for cash considerations. The left-hander was designated for assignment earlier this week, a process that made him available to other teams before the Red Sox could potentially outright him to Triple-A.

Given his performance this season, it was always unlikely Newcomb would stick around.

The veteran left-hander has been one of Boston’s biggest success stories this season, making the Opening Day roster out of spring training as a non-roster invitee before emerging as a valuable depth starter and bulk reliever. In 12 appearances (five starts) Newcomb has posted a 3.95 ERA over 41 innings, already his highest innings total since 2019.

Newcomb also played a pivotal role in helping the Red Sox survive their run of early-season rotation injuries, most notably Brayan Bello and Lucas Giolito, and more recently he had covered some crucial innings in blowouts to help preserve a Red Sox bullpen that is already running on fumes.

This will be Newcomb’s second stint with the Athletics, with whom he pitched in 2023-24. Overall the 31-year-old has pitched nine MLB seasons, including time with the Atlanta Braves, Chicago Cubs and San Francisco Giants.