Spaith joined the Calgary Stampeders in 1948 and played for them into the 1954 season. Besides playing QB, Spaith was also the punter for the Stamps. Spaith took Calgary to the Grey Cup twice, in 1948 and 1949. The Stampeders won in 1948 in one of the most memorable Grey Cups in history. It was the year the Stampeder fans went East to Toronto with their horses to put the party into the Grey Cup. The Stampeders responded with a 12-7 win over the favoured Ottawa Rough Riders to cap the only undefeated season by a CFL club. In 1948, the Stampeders won all 12 regular season games, the West final and of course the Grey Cup. Calgary went back to the Grey Cup in 1949, again in Toronto, but this time lost 28-15 to Montreal. Spaith was named the Jeff Nicklin trophy winner in both seasons as the Outstanding Player in the West (there were no national awards yet).
Wikipedia article on the 1948 Grey Cup
The West did not keep stats until 1950. There were no game played stats kept in these years.