JACKSONVILLE – Sen'Derrick Marks' offseason got significantly tougher Monday.
Marks, the Jaguars' starting defensive tackle and perhaps the team's best defensive player, sustained a torn anterior cruciate ligament in the team's regular-season finale Sunday, the team announced on Monday.
Marks, who led the Jaguars with eight and a half sacks this season, will go through the "prehab process" before undergoing surgery, the team announced.
Marks has started all 16 games in each of his two seasons with the team since signing as an unrestricted free agent in the offseason.
He also led the Jaguars with 15 tackles for loss, 16 quarterback hurries and three passes defensed.