Harold, Ray, and younger brother Gordon were instrumental in developing the sport of ice hockey in Wausau in the 1920s and 1930s. Harold was one of six Wausau young men who issued a challenge to area hockey teams in 1925.

Harold later replaced Herman Brechler as the goalie for the Wausau Vets. In the mid-1940s, Harold built a home on the Wisconsin River near Mosinee. He then became involved in the Mosinee program. At one time, as the story is told, the mothers and wives of the Mosinee team took jerseys that Harold secured from Wausau and removed the W on the front and turned them upside down into the M on the Mosinee sweaters. Walters coached the Mosinee teams in the late 1940s and early 1950s.