Can you name the athletes by the picture?

A man has a racehorse that never won a race. The man says in disgust, "Horse, you win today or you pull a milk wagon tomorrow morning."
The starting gate opens and all the horses take off running except for the man's horse which is lying there asleep on the track.
He kicks the horse and asks, "Why are you sleeping?"
The sleepy horse raises his head and says, "I have to get up at 3 o'clock in the morning."