Bynum had originally planned to play this fall as a fifth-year senior for Cal before the Pac-12 season was postponed because of the COVID-19 pandemic. Bynum then announced on Sunday his plan to enter the draft rather than play if the Golden Bears end up having a season.
Bynum is the first Cal player to declare for the draft with collegiate eligibility remaining since receiver Chad Hansen in 2017.
He is ranked No. 10 in ESPN Insider Todd McShay's latest positional draft rankings for 2021.
Bynum is on schedule to graduate in December.
The Associated Press contributed to this report.