Following the name change attendance soared, setting new records; the team's fortunes began to improve (four straight seasons of playing 500 or better), the appeal of the pro game began to surpass that of the amateur variety, and Toronto's Irish community started to pour into the Mutual Street Arena from nearby Corktown.
Prior to the 21/22 season the St. Pats signed 5 foot 5, 130-pound goaltender John Ross Roach, who also went by the nickname, the Port Perry Woodpecker. With a line-up that already boasted future Hall of Famers Dye, Captain Reg Noble, Harry Cameron and star Corb Denneny, the Irish were poised to challenge for the franchise's second Stanley Cup.
In the 1922 NHL Finals, the St. Pats took the two game cumulative score O'Brien Cup, eliminating the Senators on the back of Roach's shutout in Game 2. One Toronto paper described his performance as, "The most masterful exhibition of goaltending ever shown locally. The wee lad blocked with his stick, feet, body, hands, head, pads and in every conceivable manner. He turned down effort after effort, that was ticketed through, and his great display alone saved the Irish."
The St. Pat's would move on to face the Vancouver Millionaires in the Stanley Cup Final. Game one, at the Arena Gardens was fittingly played on St. Patrick's Day. Game two saw the Irish knock off the Millionaires in overtime, courtesy of Babe Dye. Game Three is most famous for being the first hockey game ever broadcast on radio. In Game Four, Toronto was led by Shrimp Andrews' two goal performance, on their way to a 6-0 win. In Game Five of the best of five series, Babe Dye led the way with a remarkable four goal night, as the St. Pats took the deciding game 5-1. The Stanley Cup was Toronto's once more.
Following their Cup year, the team's fortunes began to slip, they weren't winning, Toronto's Irish community was no longer showing up in the numbers they once did and by 1927, the team was up for sale and appeared to likely to be headed to Philadelphia for the price of $200,000. There was to be no pro hockey in Toronto.
Enter Conn Smythe; veteran of WWI and the former General Manager of the New York Rangers. Smythe convinced one of the St. Pats owners, J.P. Bickell, to retain his $40,000 stake in the team and was able to bring together other investors to foot the rest of the bill. Smythe himself put up a 5% stake and took on the role of Manager. The change in ownership was made official on Valentine's Day, 1927 and the team would play its final game as the St. Pats two days later, against the Detroit Cougars in Windsor Ontario.
At this time almost 80% of the city's population was English. It didn't make sense to the new ownership that the club would have a name that only appealed to one group, so the change was made from St. Pats to Maple Leafs. Smythe would say, "The Maple Leaf to us, was the badge of courage, the badge that meant home… It was a badge that meant more to us, than any other badge that we could think of... so we chose it... hoping that the possession of this badge would mean something to the team that wore it and when they skated out on the ice with this badge on their chest... they would wear it with honour and pride and courage, the way it had been worn by the soldiers of the first Great War in the Canadian Army."
The team played their first game with the Maple Leaf on their sweater on February 17, 1927 at the Mutual St. Arena, while still wearing the green and white colours of the St. Pats. George Patterson scored the first goal of the game, Ace Bailey, the eventual game winner, as the St. Pats era in Toronto hockey, officially came to a close.