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.