BC Lions Calgary Stampeders Edmonton Eskimos Saskatchewan Roughriders Winnipeg Blue Bombers Toronto Argonauts Montreal Alouttes Hamilton Tiger Cats Ottawa Renegades the biggest rule differences I can think of are 3 downs and 110 yard field

Eight teams: In the Western Division: BC Lions (Vancouver) Edmonton Eskimos Calgary Stampeders Saskatchewan Roughriders In the Eastern Division: Winnipeg Blue Bombers Hamilton Tiger Cats Toronto Argonauts Montreal Alouettes (sorry, no team from Ottawa this year) Warden did get the 3 downs right, and the 110 yard field (adapted from soccer or rugby fields). Other differences include 12 men per team on the CFL field compared with 11 men per team on the NFL field. Also, Canadian football does not allow the fair catch; instead, it requires all members of the punting team to stay at least five yards away (the "halo") from the person catching the punt. Failure to do so is the penalty called "no yards." Another difference is the single point, or "rouge" as some call it. In Canadian football, if the opposing team punts or kicks off a football into your team's end zone on anything other than a successful field goal attempt, you must run the out; otherwise, you concede one point to the kicking team. Only after you concede that point are you allowed to restart play with a first down and ten yards to go from your own 35-yard line. In the NFL, the well-known "touchback" rule does not require you to concede a single point; instead, you restart play with a first down and ten yards to go from your 20-yard line.