Posted by ESPN.com's Adam Rittenberg
Wisconsin senior linebacker Erik Prather sustained a "potential career-ending knee injury" during Saturday's scrimmage, according to the team's latest practice report. Prather, who had to be carted off the field Saturday, likely will have surgery in the next few weeks.
Prather appeared in all 13 games last fall and recorded 18 tackles (1.5 for loss). He would have provided experience and depth at linebacker, an area of concern for the Badgers after losing multiyear starters DeAndre Levy and Jonathan Casillas.
Badgers linebacker Mike Taylor returned to practice in a limited capacity after battling a hamstring injury.