(SOUTH BEND) – Notre Dame quarterback Jack Coan will start Saturday against rival USC but freshman backup Tyler Buchner will also continue to see playing time, coach Brian Kelly said Monday. Notre Dame has used at least two quarterbacks in every game since the season opener against Florida State, struggling to find consistency at the position. Kelly says Coan continues to be the guy that they feel like gives them the best chance to win, and they will mix in Tyler Buchner. Coan, who transferred from Wisconsin, asserted himself as the starter in Notre Dame's 41-38 win against Florida State, with 366 passing yards and four touchdowns. With the exception of a few impressive drives, the position has been a question mark since then, but inexperience on the offensive line also hasn't helped. The Irish have had a bye week to figure it out. Through six games, Coan has completed 61.7% of his passes with 10 touchdowns and three interceptions. Buchner has played in four games, with two touchdowns and three interceptions, and Drew Pyne has played in two games with two touchdowns and no interceptions. Of the three of them, Coan is the only one who has completed more than 50% of his passes, but he struggled in the first half against Cincinnati and was replaced by Pyne in the third quarter of the 24-13 loss. Kelly said it hasn't been a problem managing the quarterback room because all three players respect each other and want each other to succeed when they're on the field.