Got my answer. He was always injured.
As a true freshman in 2018 at Indiana, Penix played in three games, suffered a torn anterior cruciate ligament (ACL), and was redshirted.[5] He completed 21 of 34 passes for 219 yards and a touchdown.[6] Named the starter entering the 2019 season,[7][8][9] Penix, however, only played in six games due to injury, completing 110 of 160 passes for 1,394 yards, with ten touchdowns and four interceptions.[10] Penix returned to Indiana as the starter in 2020.[11][12][13] On November 30, he was ruled out for the season after suffering a torn ACL in a win against Maryland.[14]