Badminton - I have never lost to anyone other than my father (who oddly enough was once the number 1 ranked player in the state of Alabama during his college days) and to the teacher's assistant for UK's badminton class in an intramural tourney championship game (hadn't played in a few years and was an alcoholic mess - still ran through this huge tourney until he got me.... But I think at my best, I could've taken him).
Golden Tee - my best can't lose.
Swimming - full disclosure, strokin' has consistently beaten me in full on sprints by 2-3 inches. However, he happens to be 2-3 inches taller. And I have saved several lives and have never almost drowned face down in the ocean like he has. So......