Red Sox player' Carl Yastrzemski throws a first pitch to his 29

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Carl Yastrzemski, 1975

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Carl Yastrzemski throws first pitch to grandson

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Yastrzemski's first pitch

Red Sox player' Carl Yastrzemski throws a first pitch to his 29-year-old Giants rookie grandson

Red Sox player' Carl Yastrzemski throws a first pitch to his 29-year-old Giants rookie grandson

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Red Sox player' Carl Yastrzemski throws a first pitch to his 29-year-old Giants rookie grandson