OK.
Since 1950 (when the CFL started compiling stats for 1,000 yard receiving and rushing seasons), from 1950 to 1973, only 4 times in 24 years did the Grey Cup champ have a 1,000 yard receiver. - Wpg. in 1959, Ham. in 1963, Sask. in 1966, and Ott. in 1969
From 1974 to 2018, only 4 times in 45 years has the Grey Cup champ NOT had a 1,000 yard receiver - Mtl. in 1977, Wpg. in 1990, and Cal. in both 2014 and 2018.
So in total, 24 of 69 champions since 1950 have NOT had a 1,000 yard receiver. 16 of the 69 champions have had the league leading receiver on their team.
As for rushers, 32 of 69 champions have had a 1,000 yard rusher on their team (but only 2 in the last 9 years). In 1 instance, the rusher who had 1,000 yards total accumulated that total with 2 teams that season, but was on the Grey Cup champ at the end of the year. 9 times in 69 years the rushing champ has also won the Grey Cup.
From 1950 to 1973, in those 24 years the Grey Cup winner had NEITHER a 1,000 yard receiver or rusher 12 times, and had BOTH only twice (Wpg. in 1959, and Sask. in 1966).
From 1974 to 2018, in those 45 years the Grey Cup winner has had BOTH a 1,000 yard receiver and rusher 20 times, and had NEITHER only twice (Mtl. in 1977 and Cal. in 2018).
So only 14 of 69 Grey Cup champs since 1950 have had neither a 1,000 yard receiver or rusher, and the other 55 have either one of (33 times) or both (22 times). Of those 55 teams with either a 1,000 yard receiver or rusher, 24 times has that team had the league leader in either category on their team (receiver 16 times, rusher 9 times). And yes, my math is right, because...….
Only one team in CFL history since 1950 has had both the rushing leader AND receiving leader on their team in the same season that they won the Grey Cup - Calgary in 2008.