The person spoke Wednesday on the condition of anonymity because the fine has not been announced.
A second-round draft pick out of Florida last spring, Bostic delivered a hit to the Chargers' Mike Willie during Thursday's preseason game at Soldier Field that jarred the ball from the receiver and resulted in an incomplete pass. No penalty was called on the play.
Bostic was punished for delivering a hit against a defenseless receiver while lowering his head and making forcible contact with the top or crown of his helmet.
