When he found no team interested, Johnson retired at age 35.

Johnson, at 33, will then retire from sprinting as he came in - on top.

So, is there one scenario in which Johnson will retire?

Johnson retired in 1996 as the court's senior associate judge.

Johnson retired after the Celtics did not offer him a new contract at the beginning of the 1991 season.

Johnson later retired from competition and became a motivational speaker.

Rather than risk permanent blindness, Johnson retired at the age of 26.

Johnson retired in 1879 by which time he was almost totally blind.

Johnson retired at the end of the 2009-2010 season.

Johnson officially retired in July 2010, at the age of 39.