Bill O'Brien had an excellent first season as coach of the Nittany Lions and will look to duplicate that success in 2013. For that to happen, there are several players that must remain on the roster for the upcoming season.
Under that NCAA sanctions that were handed down against the program in July, current players have until the start of preseason practice to change schools without penalty.
At the beginning of last season, O'Brien had to deal with the transfers of several key starters that left huge holes in the depth chart. 2013 has the potential to present the same problem. However, there has been no talk at this point of anyone leaving.
As recently as October, a group dubbed the "Supa Six" reaffirmed their commitment to stay on the team. The group includes running back Bill Belton, tight end Kyle Carter, cornerback Adrian Amos, left tackle Donovan Smith, defensive end Deion Barnes and wide receiver Allen Robinson.
Though it seems unlikely that anyone who stuck around last year would now leave, the possibility is there. With several breakout performances during the 2012 season, other schools are sure to come to State College in hopes of stealing someone away.
The following slides look at five players that must stay in Happy Valley in order for success to continue over the next few years.