Starting rotation depth has become one of the Red Sox’s biggest strengths, and Thursday the club took a step towards ensuring that remains the case in 2026.

According to a source, the Red Sox have agreed to a one-year, $800,000 deal with right-hander Cooper Criswell, who has spent the past two seasons in Boston as a depth starter and long reliever.

The major league contract is fully guaranteed and will allow the two sides to avoid arbitration.

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The deal was first reported by FanSided’s Robert Murray.

Criswell spent the majority of this past season in Triple-A but was impressive in his handful of big league appearances. He posted a 3.57 ERA in 17.2 innings, and his most notable outing came on Aug. 1, when he was called up for an emergency spot start and allowed one run

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