Singh also competed on the US wrestling circuits, grappling with opponents like Sweet Daddy Siki, André the Giant, Hans Schmidt, Whipper Billy Watson and "Bulldog" Dick Brower. He defeated Johnny Valentine for the Toronto version of the US title and wrestled Gene Kiniski for the NWA World Heavyweight Championship in the summer of 1967 and, in the fall, twice challenged Bruno Sammartino for the WWWF Championship. With Wild Bull Curry, again defeated Watson and Brower to win the international tag title in 1968.