No. 17 Notre Dame lost two starting linemen on either side of the ball to season-ending knee injuries, coach Marcus Freeman said Monday.

Starting center Ashton Craig and defensive lineman Jordan Botelho were injured on consecutive series in Saturday’s 66-7 win at in-state rival Purdue. Starting guard Billy Schrauth will also miss a few weeks with a right ankle injury.

Botelho had a sack, two quarterback hurries and 12 tackles in three games this season for the Fighting Irish (2-1). He’ll be replaced by Boubacar Traore in Saturday’s game against Miami (Ohio) in South Bend, Ind.

Pat Coogan will draw the start at center this week and Rocco Spindler will start for Schrauth at right guard.