Julian Guilarte on X: This really hurts Jason Giambi is one of my favorite players of all-time. To see him lose his brother Jeremy at just 47 years old is though. #RIPJeremyGiambi

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Jeremy Giambi death latest - Baseball star portrayed in Moneyball dies but cause of death unknown and MLB in mourning

Julian Guilarte on X: This really hurts Jason Giambi is one of my favorite players of all-time. To see him lose his brother Jeremy at just 47 years old is though. #RIPJeremyGiambi

Julian Guilarte on X: This really hurts Jason Giambi is one of my favorite players of all-time. To see him lose his brother Jeremy at just 47 years old is though. #RIPJeremyGiambi