 He was with the team in its first appearance in the Frozen Four tournament in Lake Placid, New York in 1970.Thomas ranks in the top 10 all-time for Wisconsin goaltenders in save percentage (.909 - 9th all-time) and goals against average (2.84 - 10th all-time) as of the 2019-20 season.Thomas's National Hockey League rights were originally held by the Toronto Maple Leafs, who traded him to the Los Angeles Kings in 1968, and who in turn traded him to the Montreal Canadiens in 1970.