Pre-Snap Motion — Unlimited Backfield Motion
Why People Get This Wrong
People often assume that unlimited backfield motion means players can move around freely before the snap without penalty, thinking it's a free-for-all in the backfield. However, actually, it just allows more flexibility with who can be in the backfield and when they can move, as long as no one is illegally moving during the play itself, ensuring game integrity despite the increased mobility.
Official Verdict
Another dramatically different rule: CFL: ALL offensive backfield players (everyone except the 5 offensive linemen and the quarterback) may be in motion toward the line of scrimmage at the snap; NFL: Only ONE player may be in motion at the snap, and they may NOT move toward the line of scrimmage;...

