10. Cal Bears Why: Despite losing Pac-10 Offensive Player of the Year Marshawn Lynch, the Bears return a plethora of skill players on offense. DeSean Jackson is a big-play threat at receiver and punt returner. Quarterback Nate Longshore was much-improved in his first season as a starter, and Justin Forsett and freshman James Montgomery are in line to replace Lynch. Why not: For starters, the Bears open the 2007 season against Tennessee and must fare better than in the '06 opener. Cal must replace all its key parts on defense -- tackle Brandon Mebane, linebacker Desmond Bishop and cornerback Daymeion Hughes. The transition will be easier if the NCAA grants another year of eligibility to cornerback Tim Mixon, who missed all of 2006 with a knee injury.