Jason Giambi retires: A look back at his Athletics career
Jason The Giambino Giambi: 2000 AL MVP, 440 career HR, 5x All-Star, 2x Silver Slugger, elite .399 OBP over 20 yrs - Italian Americans in Baseball
Do-over: The A's sign Jason Giambi to an extension in 2001 - The Athletic
Jason Giambi, former Rockies 1B, announces retirement – The Denver Post
MORE
Revisiting Jason Giambi's 2005 comeback season - Beyond the Box Score
Jason Giambi retiring after 20-year career with A's, Yankees, Rockies and Indians – New York Daily News
Jason Giambi - Wikipedia
Zwelling: Giambi and Helton make grand exits
Jason Giambi's walk-off home run keeps Cleveland's playoff hopes alive (plus more AL scores)
Former Colorado Rockies star Troy Tulowitzki retires, Sports