In American and Canadian football the line of scrimmage is the imaginary transverse line crossing the football field across its narrower dimension, which passes through the last position of the football, after the end of the most recent play and following the assessment of any penalty yards.
In American and Canadian football a line of scrimmage is an imaginary transverse line crossing the football field across its narrower dimension, beyond which a team cannot cross until the next play has begun. Its location is based on the spot where the ball is placed after the end of the most recent play and following the assessment of any penalty yards.