Posted by ESPN.com's Tim Griffin
"I want to apologize to the UNLV coaches, players and fans for my conduct during our game Saturday," Johnson said. "I take full responsibility for my actions. I take full responsibility for the consequences of my actions. I don't want people to think less of my school, my coaches and my teammates because I didn't represent Iowa State in a positive way."
Johnson was assessed two personal fouls on the same first-quarter series, including a late hit on UNLV quarterback Omar Clayton following a 20-yard touchdown run. Johnson was ejected on the play.
"This is embarrassing for me personally," Johnson said. "I will work hard in the future to represent Iowa State University and Cyclone football in a positive way."
Iowa State coach Gene Chizik said he would not release Johnson's punishment with the team, but said the matter has been addressed.
"We handled that within our team and it's already been taken care of," Chizik said. "He's doing what we need him to do."