Jason Giambi retiring after 20-year career with A's, Yankees, Rockies and Indians – New York Daily News
Jason Giambi is Retiring from Baseball
Miguel Tejada, Baseball Wiki
After 20 seasons, Giambi calls it a career
Jason Giambi: Astros' cheating 'no different' than PED scandals
José Canseco, Baseball Wiki
What Happened to Jason Giambi and Where is He Now? - FanBuzz
Jason Giambi retires after 20 seasons
Jason Giambi retires after 20 MLB seasons
From the archives: Jason Giambi says nothing, but brother confesses using illegal drug - Newsday
Jason Giambi announces retirement from MLB, calls career 'incredible journey' - ESPN
Jason Giambi's walk-off home run keeps Cleveland's playoff hopes alive (plus more AL scores)
The Highest-Paid Player in the MLB the Year You Were Born
Jason Giambi retires from MLB - ABC7 New York