Denver Broncos quarterback Peyton Manning (18) warms up with passing drills during training camp activities at the UCHealth Training Center. (Ron Chenoy/USA TODAY Sports)

Aug 12, 2015; Englewood, CO, USA; Denver Broncos quarterback Peyton Manning (18) warms up with passing drills during training camp activities at the UCHealth Training Center. Mandatory Credit: Ron Chenoy-USA TODAY Sports