Above is another great photo found in the City of Toronto Archives showing four Maple Leafs at what appears to be Varsity Arena in Toronto. No names or dates were attached to the photo, that's where the Society for International Hockey Research database comes in handy.
The easiest to identify is second from right, Leaf defenseman Wally Stanowski, and at the far right centre, Pete Langelle. (both pictured below)
Both of them were from Winnipeg and after beginning their NHL careers with Toronto, both would join the Canadian Military in 1942. They skated together in their hometown in the Winnipeg National Defense League with the Winnipeg RCAF Bombers hockey club. They each remained there for three seasons until the end of World War II. Stanowski returned to claim his spot on the Maple Leaf blue line during the 44/45 season while Langelle played out his career in the minor leagues.
To identify the other two players I reached out to hockey researcher/author Paul Patskou. He was able to identify the player on the left as Wilfred 'Bucko' McDonald, another Leaf defender of the time. He was a Leaf until traded to New York Rangers in November 1943 meaning the photo would have to be taken prior to that.
Paul proposed the fellow was George Boothman, a 6'2" defender who essentially replaced Stanowski during the War years. Although his height matches, I don't believe the facial resemblance is a match. Also, the guy in the photo looks fairly young, Boothman would have been in his late-20s then.