Chalk took a high ball on the sixth tackle on the Salford 25-yard line and raced over in the corner to start the fight back.

BBC: Celtic Crusaders 25-12 Salford

Griffin sprained his knee last month when he was hit by Baltimore Ravens defensive tackle Haloti Ngata at the end of a 13-yard scramble.

WSJ: Robert Griffin III: Surgery Reveals Damage to Washington Redskins Quarterback's ACL