Randy Smith always struck me as excelling at an odd combination of sports: basketball and soccer. He was All American at both in college. He went on to play 10 years in the NBA, including two all-star games. He worked out regularly with some NASL teams (yeah, I know not the height of soccer) and was good enough to be offered a contract.
I wouldn't think the physical attributes needed to excel at basketball would transfer to soccer.
What's the most unlikely set of sports that any athlete has excelled at?