Ex-A's slugger Jason Giambi retiring after 20 seasons
Athletics and Yankees connections go way back
Jason Giambi signing with the Yankees was the biggest gut punch in terms of someone leaving the A's. Who are you still not over leaving? : r/OaklandAthletics
Giambi announces retirement after 20 seasons
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Jason Giambi retires after 20 MLB seasons - Mangin Photography Archive
Jason Giambi - Wikipedia
Jason Giambi retires after 20 MLB seasons - Mangin Photography Archive
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Jason Giambi Retires - MLB Trade Rumors