Sourdough Sam in February 2009.
Sourdough Sam is a mascot for the NFL's San Francisco 49ers. According to his official biography, he has five nicknames: Sam, Sammy, Samster, Sammiester, Samarama. He wears jersey #49.
Just prior to the 2006 NFL Season, Sam's appearance was altered somewhat. He used to appear as a character with a scruffy brown beard, brown eyes, and a wide-brimmed ten-gallon hat with a chunk taken out of its brim. He then appeared as a clean-shaven gold panner with blue eyes and a hat without any imperfections. A bearded Sourdough Sam returned for the 2011 season.
He originated as the team's logo from 1946-62, where a prospector was depicted shooting two pistols and jumping in the air.
Outside appearances 
He has appeared on FOX, Monday Night Football, ESPN's SportsCenter, Extra, MTV, Evening Magazine, and Nickelodeon.
- 49ers.com , Retrieved June 12, 2012