One Fast Injun - S15.E9

A prospector who continuously loses bets and is subject to ridicule from a barroom crowd; thinks he has discovered salvation by betting on a fast Indian that he spots running near his mine. After winning a few bets and paying an opposing runner to throw a race; he loses again when the opposing runner uses some of his bribe money to pay the fast Indian to throw the race. However, the barroom crowd has a good laugh at his expense and he wins back the friendship that he lost while he was winning.