Greg Ray Theberge (born September 3, 1959 in Peterborough, Ontario) is a retired Canadian ice hockey player, and is the grandson of former NHL player and Hall of Famer Dit Clapper.
A defenceman, Theberge was drafted 109th overall in 1979 by the Washington Capitals. He played his entire NHL career with the Capitals, also playing for their AHL farm team affiliate the Hershey Bears.
Greg spent his OHL career with the Peterborough Petes, and his son, Brett, is carrying on the tradition as a current member of the Petes.
He is currently the colour commentator for TVCogeco covering the North Bay Battalion, alongside play-by-play man Ranjan Rupal.