I know we're not all sports fans, but we've all sat down in front of some televised sporting event, seen some aging athlete, and said, "Is he/she STILL going?" Some athletes refuse to give up, even after their prime. Sometimes to the point of embarrassment. Some of these people get honorable mention here. Which athletes do you think should just give up, or gave up way later in their career than they should have?
Others I can think of:
Gordie Howe (hockey)
Ben Johnson (Canadian sprinter)
Magic Johnson (basketball)