Clarett started classes on Monday, after the university allowed him reentry, an Ohio State spokesman said in a statement released Monday evening.
"Maurice Clarett has been granted reentry into The Ohio State University, following a review by the College of Education and Human Ecology," said Jim Lynch, director of media relations for Ohio State.
Ohio State University Statement On Clarett's Reentry | SLIDESHOW:
Clarett will attend classes for the second half of OSU's summer quarter.
"This is a surreal feeling to be back at Ohio State in such a supportive environment," Clarett said in a statement. "I have looked forward to being back in school and I'm doing my best to fit in with other students. I don't want to be a distraction or nuisance to the football team or to students on campus."
Clarett served more than 3 1/2 years in the Toledo Correctional Institution for aggravated robbery and carrying a concealed weapon, 10TV News reported.
Clarett was the starting tailback on Ohio State's 2002 football team that went undefeated and won the national championship. He never played a game for the Buckeyes after the 2002 season.
He was a third-round draft choice by the Denver Broncos in 2005 but never saw action in a regular-season game.
On Jan. 1, 2006, Clarett was charged with aggravated robbery after police said he flashed a gun at people outside a bar and robbed them of a cell phone. Then, on Aug. 9, Clarett was arrested after a chase when police said that they tried to stop him for a traffic violation.
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April 7, 2010:
Ex-Ohio State Star Clarett Granted Early Release
April 6, 2010: Ex-Ohio State Player Clarett To Leave Prison
February 9, 2010: Judge To Decide Maurice Clarett Early Release Request
August 5, 2009: Clarett Withdraws Clemency Request
June 18, 2009: Clarett Asks Governor For Pardon