Packers.com presents 'Prospect Primer,' a video look at an assortment of draft-eligible players who attended the scouting combine in Indianapolis. Penn State's Michael Mauti has sustained three ACL tears in his knees over the past five years. His last two college seasons both ended early due to ACL injuries. Upon concluding his college career with another knee injury, sent letters to all 32 NFL GMs expressing his love and dedication to the game.