Why can't tomatoes ever beat lettuce in a race?
Because lettuce is always a head, and tomatoes have to ketchup!
Why couldn't the garden gnome run in the marathon?
Because he's not part of the human race!
Why wasn't the jogger all that bummed out when his girlfriend broke up with him?
'Cause they had a good run.
Why was the criminal dubbed the Beer Runner let go after being arrested for stealing 23 beers?
'Cause the prosecutors didn't have a case.
Why did the blonde run backward?
She wanted to gain weight.