TRAIL

What is TRAIL?

TRAIL meaning when a running play goes toward the D gap on one side of the offense, one defender on the back side of the play must trail it in case the play is a reverse; the job usually goes to the backside contain man; some coaches have the trail man follow the ball carrier while looking for another prospective ball carrier coming at the first ball carrier to receive a handoff or pitch; other coaches simply have the trail man “stay home,” that is, remain in place while looking for a reverse play coming back toward him; the trail man’s job is to stop the reverse

 

reference: John T. Reed: DICTIONARY OF AMERICAN FOOTBALL TERMS