Cal's athletic department announced Bigelow's decision Wednesday, the final day for juniors to declare for the draft. He ran for 421 yards and two touchdowns on 105 attempts last season for the Golden Bears, who went 1-11 in Sonny Dykes' first season as coach.
Bigelow burst onto the scene with 160 yards rushing and two touchdowns in a loss at Ohio State as a sophomore. But he struggled to consistently produce the rest of the season, and then battled the effects of offseason knee surgery most of last year.
Bigelow is the fifth player to leave Cal early this offseason. Defensive back Kameron Jackson, tight end Richard Rodgers, linebacker Khairi Fortt and defensive tackle Viliami Moala already had declared for the draft.