The November 28 1936 edition of the Toronto Globe and Mail included one page that had two ads featuring Toronto Maple Leaf star King Clancy.
The first ad was for a pair of skates that you could buy at Simpson’s:
The King himself was going to be at Simpson’s that day!
The second ad featured King endorsing Eno’s Fruit Salt:
I find it hard to believe that 7 out of 10 NHL players took Eno’s Fruit Salt regularly, but I do not know that for sure.
King Clancy (1902-1986) was at the end of his career when these ads came out – in fact, just about exactly at the end of his career, as he retired six games into the 1936-1937 season after a slow start. He later became an executive with the Leafs, holding that position until he passed away.
This blog has covered fruit salts a few times before – here’s the Wikipedia entry on fruit salt.