Topic summary
Counter Trey

Extracted from the Wikipedia article Counter run.
Counter trey
The most popular variation on the counter is the counter trey. This play is designed for the offensive team to feign rushing one way, then attack the defense in the opposite direction. In a counter trey right, the center, right guard, and right tackle block left as if the play is going left, with the right tackle leaving the last defensive player on the line of scrimmage unblocked. The left guard and left tackle are pulling or turning, and running to the right parallel with the line of scrimmage. The left guard will block the last defensive player on the line of scrimmage and the tackle will cut underneath him and block the first defender in the hole.