Ohio State quarterback Braxton Miller is out for the season after sustaining a right shoulder injury during Monday's practice, a source told ESPN's Brett McMurphy.
Miller had an MRI on his throwing shoulder Tuesday morning, revealing the season-ending injury.
Widely tabbed as a Heisman Trophy contender this preseason, Miller suffered the injury during the Buckeyes' practice Monday, just hours after the senior declared himself 100 percent healthy following offseason surgery to the shoulder.
Miller sustained the injury during a non-contact portion of the practice and was taken off the field under medical supervision, a source told ESPN on Monday.
Miller threw for 2,094 yards and 24 touchdowns and ran for 12 more scores in leading the Buckeyes to the Discover Orange Bowl this past season.
Ranked fifth in the preseason Associated Press poll released Sunday, Ohio State is expected to be in the national title conversation.