Two days before Thanksgiving, the Red Sox have made their first major move of the offseason.

Boston has acquired veteran starter Sonny Gray and cash ($20 million) from the Cardinals for pitchers Richard Fitts and Brandon Clarke, a source confirmed to MassLive on Tuesday. Gray had to waive his no-trade clause to approve a deal to Boston and accepted one, facilitating the trade. It’s expected to be official soon.

Chief baseball officer Craig Breslow has spoken frequently about upgrading Boston’s rotation in the wake of the club’s early postseason exit last month and has done so by adding Gray, a three-time All-Star who has one year left on his contract. It’s unclear if the Red Sox look at Gray as a true No. 2 option to slot alongside ace Garrett Crochet, but in any case, he’ll join, Croc

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