Nick Mullens' first NFL start will come in prime time.
The San Francisco 49ers rookie quarterback is set to start in place of C.J. Beathard against the Oakland Raiders on *Thursday Night Football*, the team announced.
Beathard, who was listed as questionable heading into the game because of a wrist injury, will serve as Mullens' backup.
Mullens was promoted from the practice squad to the active roster after starter Jimmy Garoppolo was lost for the season with a torn ACL. He hasn't seen an in-game snap since taking over as the 49ers' No. 2 signal-caller. Mullens gets the start on the same day San Francisco waived journeyman quarterback Tom Savage.
ESPN first reported the development.