Alexander Popov, the "Russian Rocket", was one of the dominant freestyle sprinters in the 1990s, winning the 50 and 100 meter freestyle at both Barcelona in 1992 and Atlanta in 1996. Somewhere along the line he also got stabbed in a street fight and came back and won more medals, notably in the World Championships in Barcelona in 2003.
Interestingly (at least to me), he had two sons in 1997 and 2000 with a fellow Russian swimmer, but he and his wife weren't done, bringing another daughter into the world in 2010.
I knew he was doing something with sports and the Olympics now, but I didn't know how deeply involved he was. He's on the supervisory board for the Sochi Olympics, even though the water there will mostly be frozen. You can read more about him at the link, which was apparently written before the decade-later daughter.
So currently he's also on the supervisory board of Adidas, according to Wikipedia.
I also found a picture of him and the wife (and the team doctor for Philips Sports Vereninging, a good soccer team).