When its not regular/post season, teams are allowed to have 80 men...Not all teams carry the maximum. 80 x 32 = 2,560 players during the off-season/pre-season.
According to espn.com, the following players from Penn State are in the NFL as of the 2007 season:
Anthony Adams - Chicago Bears Jay Alford - New York Giants Kyle Brady - New England Patriots Levi...
Former University of California players that were on an NFL roster in 2008: 1) Craig Stevens - Titans 2) DeSean Jackson - Eagles 3) Lavelle Hawkins - Titans 4) Justin Forsett - Colts 5) Thomas DeCoud...