J.D. Martinez declines to opt out, remains with Red Sox
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J.D. Martinez declines to exercise opt-out clause, returns to Boston Red Sox for 2022 season - TSN.ca
J.D. Martinez doesn't opt out of contract with Red Sox - ESPN
MLB notebook: Martinez reportedly declines opt out, will remain with Red Sox
The Red Sox Add a Slugger of Their Own, Signing J.D. Martinez - The New York Times
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