Mike Yastrzemski, grandson of Red Sox legend Carl, homers at Fenway Park

Mike Yastrzemski, grandson of Red Sox legend Carl Yastrzemski, homered at Fenway Park because sports are undefeated

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A legacy in left field: Giants OF Mike Yastrzemski visits with legendary grandfather - Yaz - and homers in fairytale trip to Fenway Park

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Mike Yastrzemski, grandson of Red Sox legend Carl Yastrzemski, homered at Fenway Park because sports are undefeated

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