Ex-A's slugger Jason Giambi retiring after 20 seasons
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Jason Giambi retires: A look back at his Athletics career - Athletics Nation
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Jason Giambi retires after 20 MLB seasons - Mangin Photography Archive
Jason Giambi retiring after 20-year career with A's, Yankees, Rockies and Indians – New York Daily News
Jason Giambi retires after 20 MLB seasons - Mangin Photography Archive
Jason Giambi is Retiring from Baseball
