Here is another of the 1921 Moose Jaw guys ( I love the really obscure team stuff!)
SHULTIS- Lane Shultis is pictured next to "Junk" Walters (I was right on that ID earlier)...
LEAKE-is probably Hollis Jefferson Leake or Albert Leake (the Leake in question apparently played with Edmonton in 1921). These are probably the same individual--but that needs to be confirmed. Hollis has some Zeenut cards which I don't own, 1917 and 1918.
LEIFER- is Elmer Edwin Leifer who is also depicted on a 1918 Zeenut.
GATEWOOD- likely Earl Gatewood who played briefly with the 1920 Portland PCL team