OAKLAND, CA - AUGUST 14: Trumaine Johnson #22 of the St. Louis Rams grabs the facemask of Michael Crabtree #15 of the Oakland Raiders during their game at O.co Coliseum on August 14, 2015 in Oakland, California. (Photo by Ezra Shaw/Getty Images)
OAKLAND, CA - AUGUST 14: Trumaine Johnson #22 of the St. Louis Rams grabs the facemask of Michael Crabtree #15 of the Oakland Raiders during their game at O.co Coliseum on August 14, 2015 in Oakland, California. (Photo by Ezra Shaw/Getty Images)