Awareness: 6.5%
Appeal: 71.5
Affiliation recognition: 56.6%
Eight feet tall and known for on-field pranks and staged sparring with opposing mascots, Billy has been a Marlins staple since the baseball team's debut season in 1993. He even made it to Chicago for a relocated home game after Hurricane Ivan knocked the team out of its stadium in 2004. (Justin Sullivan/Getty Images)