OAKLAND, CA - AUGUST 14: Amari Cooper #89 of the Oakland Raiders jogs to the line of scrimmage during their game against the St. Louis Rams at O.co Coliseum on August 14, 2015 in Oakland, California. (Photo by Ezra Shaw/Getty Images)
OAKLAND, CA - AUGUST 14: Amari Cooper #89 of the Oakland Raiders jogs to the line of scrimmage during their game against the St. Louis Rams at O.co Coliseum on August 14, 2015 in Oakland, California. (Photo by Ezra Shaw/Getty Images)