The Boston Red Sox added 36-year-old right-hander Sonny Gray to their rotation on Tuesday, filling one of their biggest needs by acquiring the three-time All-Star from the St. Louis Cardinals with more than two months left in the offseason.

The Cardinals will eat $20 million of Gray’s salary and receive righty Richard Fitts and a prospect in the deal. Gray gives Boston a dependable option who could take some of the pressure off the rest of the rotation behind ace Garrett Crochet.

Gray went 14-8 with a 4.28 ERA for the Cardinals last season, striking out 201 batters and walking 38 in 32 starts — the best ratio in the NL. He is one of five pitchers to record at least 200 strikeouts in each of the last two seasons.

In a 13-year career with five teams, Gray is 125-102 with a 3.58 ERA.

Fitt

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