Stafford sensed Bears game would be Calvin's finale
Calvin Johnson opens up about his early retirement, Aaron Rodgers
Mega-gone: Calvin Johnson retires from NFL at age 30
Retiring Calvin Johnson's number is not even a question for the Lions
John Harbaugh doesn't want to see Calvin Johnson retire - ESPN
Lions have made repairing relationship with Calvin Johnson a top
Megatron isn't coming back to the NFL, has taken up surfing
Calvin Johnson Is Either Thinking About Retiring or Trying to
Adrian Peterson hopes Calvin Johnson doesn't retire