Pat Caputo – For Detroit Lions, for himself, timing perfect for Calvin Johnson to retire – The Oakland Press
NFL on ESPN on Instagram: “Lions announce that Calvin Johnson has officially retired.”
Former Detroit Lions receiver Calvin Johnson says he is content in retirement - ESPN
A Megatron comeback? Teams reportedly are seeking rights to Calvin Johnson from Lions - The Washington Post
Calvin Johnson's First Nickname Was a Lot Less Cool Than Megatron
Is Calvin Johnson coming back to the NFL? Megatron responds to questions regarding potential Lions return
Detroit Lions great Calvin Johnson willing to mentor rookie WR Jameson Williams - ESPN - Detroit Lions Blog- ESPN
Report: Calvin Johnson told Lions he planned to retire
Report: Calvin Johnson told family, Lions he plans to retire
Calvin Johnson opens up about his early retirement, Aaron Rodgers' recruitment pitch, ongoing rift with Lions
Calvin Johnson - Wikipedia
ESPN report says Calvin Johnson told Jim Caldwell about retirement
Detroit Lions Wide Receiver Calvin Johnson on Cover of ESPN The Magazine's 2012 NFL Preview; on Newsstands August 24 - ESPN Press Room U.S.
Detroit Lions' Calvin Johnson paid back part of bonus before retiring