State College police issued an underage drinking summons August 24 to Clint Gyory. He was also cited for public drunkenness and criminal mischief on August 1.
Gyory was supposed to don the brown Nittany Lion costume for Saturday's opener against Youngstown State. But athletic department officials say he's been suspended for a month.
Penn State cheerleading coach Curtis White said in a statement this week that Gyory regrets his actions.
An athletic department spokesman says someone else will wear the brown Nittany Lion costume this month and appear at all football games and other scheduled events.
Another student who played the mascot was suspended for the 2009 Rose Bowl against Michigan State after a DUI charge.