FILE—In this Dec. 13, 2019, file photo, Ed McCaffrey autographs a Denver Broncos football for Paul Hulac after a news conference introducing McCaffrey as Northern Colorado football coach in Greeley, Colo. (Alex McIntyre/The Greeley Tribune via AP, File)

FILE—In this Aug. 31, 2019, file photo, Michigan quarterback Dylan McCaffrey warms up for the team's NCAA college football game against Middle Tennessee in Ann Arbor, Mich. McCaffrey will play for Northern Colorado, team coached by his father, retired NFL wide receiver Ed McCaffrey, in the season ahead. (AP Photo/Paul Sancya, File)

FILE—In this July 26, 2018, file photo, San Francisco 49ers wide receiver Max McCaffrey makes a reception during NFL football practice in Santa Clara, Calif. McCaffrey has joined the coaching staff of his father, retired NFL wide receiver Ed McCaffrey, to guide the Bears on the gridiron at Northern Colorado. (AP Photo/Ben Margot, File)

FILE—In this Friday, Dec. 13, 2019, file photo, Ed McCaffrey speaks with attendees before a news conference introducing the former NFL wide receiver as the new Northern Colorado football coach in Greeley, Colo. McCaffrey will count one of his sons as a member of this coaching staff in the seasopn ahead as well as another one of his sons as the starting quarterback. (Alex McIntyre/The Greeley Tribune via AP, File)