In January 1946 it was rumoured that the league would expand to 16 teams. In January Toronto Scottish rejected an offer of a franchise in the newly-formed North American Professional Soccer League. President Jimmy Peden citing financial reasons. The John Inglis club of the Toronto & District League joined the NASPL and the Ontario Major League in March 1946. They later changed their name to the Toronto Greenbacks.
Ulster United made a clean sweep of all honours in the 1946 season. They won the Dominion Cup, the Ontario Major Soccer League, the Consols Cup, the Dunlop Cup and the Harris trophy. Ulster United played in 50 games, winning 47 and losing 3. The three losses came in exhibition games.
Liverpool beat Ulster United 11-1 on June 6 at Maple Leaf Stadium. The game was watched by 15,000 persons, the second largest crowd to ever see a soccer game in Canada. The largest was the 21,000 persons that watched the game between Ulster United and Scottish side Third Lanark in 1921.
GP W L T GF GA Pts 1. Ulster United