Jason Giambi retires: A look back at his Athletics career

Ex-Athletics star Jason Giambi announces retirement

Remember when the A's won 20 straight? Looking back 15 years later – East Bay Times

Jason Giambi: MLB Player Retires After 20 Years

Giambi Homers as Rockies Beat Yankees - The New York Times

Former Colorado Rockies star Troy Tulowitzki retires, Sports

Jason Giambi retiring after 20-year career with A's, Yankees, Rockies and Indians – New York Daily News

New York Yankees star Paul O'Neill tops list of best MLB from Columbus

Zwelling: Giambi and Helton make grand exits

The Giambi Tales Cigar Aficionado

Chris Ballard: Once a feared slugger, 41-year-old Jason Giambi quietly nears the end - Sports Illustrated

Jason Giambi Retires: A Look at His Quick Decline

Catching up with MVP Jason Giambi