Pittsburgh Steelers safety Ryan Mundy was fined $21,000 for his v hit on Oakland Raiders wide receiver Darrius Heyward-Bey.

The fourth-quarter, helmet-to-helmet collision left Heyward-Bey unconscious, until he was lifted onto a stretcher and taken to a local hospital. He was released the next day with a concussion and neck strain. He’s expected to make a full recovery.

The injury happened as Heyward-Bey ran across the end zone for a pass from Carson Palmer. Mundy hurled his body and lowered his helmet into Heyward-Bey’s facemask.