Purdue sophomore quarterback Rob Henry suffered a non-contact anterior cruciate ligament tear in his right knee at practice on Tuesday. The school announced the injury in a news release on Wednesday.
Further diagnosis will determine the extent of the injury and how long Henry will be sidelined.
"Rob Henry is a huge part of our football program, our heart goes out to him" Purdue coach Danny Hope said in a statement. "He was voted a captain by the team in the spring, and I know he will continue to inspire and push Robert (Marve), Caleb (TerBush), Sean (Robinson) and all of his teammates forward."
Henry was projected as the starting quarterback. Backup quarterback Robert Marve has been limited at practice as he continues to recover from a knee injury that ended his 2010 season after four games. TerBush and Robinson are the other options.
Henry made seven starts and appeared in 11 games last year. He became the first quarterback in Purdue history to lead the team in rushing (547) and passing (996) yards.