Bid now on this unnforgetable Oakland A's classic button down baseball jersey signed by #16 Jason Giambi. Includes Leaf Authentics Certificate of Authenticity. Serial Number: 56892. Along with a matching holographic serial number adfixed to the memorabilia.

Giambi made his major league debut with the Athletics in 1995. Originally used occasionally as an outfielder, third baseman, and first baseman, Giambi assumed the full-time first base job upon the trade of Mark McGwire.

Giambi hit two home runs in Oakland's 2000 season opener on April 3, the first Athletics player to ever do so.[5] In the 2000 season, he led the league in on-base percentage (.476; leading the majors) and walks (137; a personal high and still the most walks in the AL since 1991). He hit .333 (seventh in the league) with 43 homers (second; a career high), 137 RBIs (fourth; a career high), 108 runs (10th), and a .647 slugging percentage (third).

 Jason Gilbert Giambi (born January 8, 1971) is an American former professional baseball first baseman and designated hitter. In his Major League Baseball (MLB) career, which began in 1995, Giambi played for the Oakland Athletics, New York Yankees, Colorado Rockies, and Cleveland Indians.