In gridiron football, if a team has more than the allowed number of players on the field during a play (eleven in NFL, twelve in CFL), the offending team is penalized five (American) or ten (Canadian) yards for "too many men on the field" (also called "twelve/thirteen men on the field"). This is usually the result of an improper substitution. The 2009 Grey Cup game in the CFL was decided on a too-many-men call.