Sports world reacts to Calvin Johnson's retirement
Calvin Johnson's Retirement Reveals Pain Impossible to Ignore for NFL Players, News, Scores, Highlights, Stats, and Rumors
Calvin Johnson (Character) - Giant Bomb
NFL: Detroit Lions star Calvin Johnson set to retire
Lions' Calvin Johnson plans to retire, according to reports - Acme Packing Company
Detroit Lions' Calvin Johnson is retiring and is 'at peace with it'
Calvin Johnson's Experience with the NFL and Traumatic Brain Injury
Calvin Johnson Contemplating Retirement from Lions, NFL
Calvin Johnson's beef with the Lions, and his $1.6M demand, explained
Mega-gone: Calvin Johnson retires from NFL at age 30
Former Lions WR Johnson ready to join football royalty in Hall of Fame
Bell: Only the NFL grind could stop Calvin Johnson
NFL notes: Calvin Johnson tells Lions he's retiring, report says - The Boston Globe