Calvin Johnson content in retirement, not 'treated the way I should have been' by Lions
Calvin Johnson aims to change game with cannabis business
NFL Notebook: Lions' Calvin Johnson retires - West Central Tribune
Is Falcons WR Julio Jones considering early retirement? It's possible, says Jeff Schultz - The Falcoholic
Calvin Johnson's amazing career makes him Hall of Fame worthy
Vikings' Robert Smith retired much like Calvin Johnson reportedly will
Calvin Johnson told Detroit Lions he plans to retire - ESPN
Calvin Johnson - Wikipedia
Peyton Manning, Calvin Johnson make Pro Football Hall of Fame
NFL: Detroit Lions star Calvin Johnson set to retire
Report: Calvin Johnson tells Lions he plans to retire
Lions say they're giving Calvin Johnson time to decide future - Newsday
Lions' Calvin Johnson makes 'difficult decision' to retire