Selleck is an accomplished indoor and beach volleyball player, playing the outside hitter position for the Outrigger Canoe Club, Honolulu. (Son Kevin attended Selleck's alma mater, USC, and became a volleyball team All-American in 1990.) Outrigger Canoe Club teammate Dennis Berg, in the summer 2011 issue of "Volleyball USA" magazine, said of Selleck, "Tom was a great teammate, appreciative of being included with such a talented and experienced group, practicing and playing hard when his "Magnum" schedule permitted... He was very patient with all of us, and we relished the big crowds that replaced the usual sparse number of players' friends and spouses at the national tourney matches."