New England Patriots quarterback Tom Brady with his son Benjamin Brady after a joint workout with the Tampa Bay Buccaneers at NFL football training camp, in Foxborough, Mass., Tuesday, Aug. 13, 2013. (AP Photo/Charles Krupa)
CAMP PENDLETON, Calif. – The Dallas Cowboys watch Marines and role players take part in a demonstration at the Infantry Immersion Trainer, August 12. The Infantry Immersion Trainer is a hands-on, mixed reality training facility that simulates the sights, smells, sounds and feel of village, in designated locations. The purpose of the facility is to provide a realistic environment in which to train Marines for deployment.
Cecil Shorts IV, 2, sports his father Jacksonville Jaguars’ Cecil Shorts III’s helmet during NFL football training camp Wednesday, July 31, 2013, in Jacksonville, Fla. (AP Photo/The Florida Times-Union, Bob Self)
New Orleans Saints defensive back Chris Carr (40) puts his shoulder pads on his son, 21-month-old Octavian Carr, after their NFL football training camp in Metairie, La., Monday, July 29, 2013. (AP Photo/Gerald Herbert)