Red Sox shut down former Cy Young winner from baseball activities after setback

The Red Sox have shut down Corey Kluber from baseball activity, the team informed reporters (including Julian McWilliams of the Boston Globe). The right-hander suffered a setback while rehabbing from shoulder inflammation that sent him to the injured list five weeks ago.

It’s unclear if Kluber’s season is finished. He at least seems likely to be moved to the 60-day injured list once the Sox need a 40-man roster spot, as it’s hard to envision him being ready for MLB action before the third week of August — when he’d be eligible to return from a 60-day placement.

The 2023 season has been a frustration for the two-time Cy Young winner. Kluber struggled over nine starts, posting a 6.26 ERA in 41 2/3 innings. The Sox bumped him out of the rotation. Unlike Nick Pivetta — who has thrived in somewhat shorter stints — Kluber has continued to scuffle in relief. He’s allowed 14 runs in 13 1/3 innings out of the bullpen, largely on account of six homers surrendered.

Kluber’s contract has an $11M club option for next season. Whether he’s able to make it back to the mound or not, that’ll get bought out. He’ll return to free agency during the upcoming offseason.