Say what?
The Canadian football field is 110 yards long. Nothing metric about it.
http://en.wikipedia.org/wiki/Canadian_football
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Canadian football is a form of gridiron football played in Canada in which two teams of 12 players each compete for territorial control of a field of play 110 yards (101 m) long and 65 yards (59 m) wide[1] attempting to advance a pointed prolate spheroid ball into the opposing team’s scoring area (end zone). In Canada, the term football usually refers to Canadian football and American football collectively, or either sport specifically, depending on the context. The two sports have shared origins and are closely related, but have significant differences—in particular, 12 players on the field per team in Canadian football rather than 11, and three downs per possession rather than four. The smaller number of downs in Canadian football results in less offensive rushing than in the American game.
American football fields used to be longer than 100 yards. The stadium that McKim Mead and White (Stanford White) designed for Harvard was too small to fit the larger field so the size was reduced to 100 yards.