ST. JOSEPH, Mo. -- The Chiefs have released running back Cyrus Gray, who tore his ACL last November, in what coach Andy Reid described Wednesday as a "football decision."

The former sixth-round pick ran for 99 yards and a touchdown in 35 games, but was also a valuable special teams player. His departure leaves Jamaal Charles, Knile Davis, Keshawn Hill, Anthony Sherman, Spencer Ware and Charcandrick West among running backs on the roster.

While Eric Berry's return from cancer treatment dominated the first day of training camp, there was some other injury news. Wide receiver Chris Conley strained his knee during the workout, and linebacker Ramik Wilson was placed on the non-football injury list with a back strain.

More from FoxSports

Quarterback Tyler Bray worked out with the trainers. He's returning from an ACL injury.