Indiana quarterback Michael Penix Jr. had his first three seasons end early because of injuries. The Hoosiers remain hopeful Penix won't make it four in a row. Coach Tom Allen said Monday that the redshirt junior suffered a separated throwing shoulder during Saturday's loss at Penn State. He is out indefinitely and is being listed as week to week. Jack Tuttle, who replaced Penix for the final two games last season, is expected to take over when the Hoosiers return to action Oct. 16 against No. 11 Michigan State.The Hoosiers (2-3, 0-2 Big Ten) have a bye this week. The injury occurred when Penn State linebacker Brandon Smith drove Penix into the ground during the third quarter. Since returning from a torn anterior cruciate ligament in his right knee, which ended his 2020 season, Penix was completing just 53.7% of his throws and had thrown seven interceptions and four TD passes. He threw three interceptions in each of Indiana's first two losses, with two returned for touchdowns. - AP College Football