The Notre Dame Box is a variation of the single-wing formation used in American football, with great success by Notre Dame in college football and the Green Bay Packers of the 1920s and 1930s in the NFL. Green Bay's coach, Curly Lambeau, learned the Notre Dame Box while playing for Knute Rockne in the late 1910s. Rockne learned it from Jesse Harper, who learned it from coach Amos Alonzo Stagg. It contained two tight ends, and 4 backs. The formation often featured an unbalanced line where the center (that is, the player who snapped the ball) was not strictly in the center of the line, but close to the weakside.
Players line up in T formation then shift to a box formation. Although modern use of this offensive formation is largely defunct and exterminated among college and professional teams, several high school football teams across the United States have revived the Notre Dame Box offense and have been highly efficient and successful. Three notable high schools that successfully implemented the Notre Dame Box offense extensively are Western Harnett High School in Lillington, North Carolina, Nauset Regional High School in Eastham, Massachusetts, and Isabella High School in Maplesville, Alabama
The Notre Dame Box differed from the traditional single-wing in that the line was balanced and the halfback who normally played the "wing" in the single-wing was brought in more tightly, with the option of shifting out to the wing. These two changes made the backs' formation resemble a square (hence the "box") and made the formation less predictable, allowing offenses to run more easily to the "weak" side. Additionally, the halfback became a more viable runner than in the single-wing and the quarterback, normally just a blocking back in the single-wing, could become a passer since the center could snap the ball directly to him. The Notre Dame Box relied on a great deal of deception, caused by backs shifting frequently, rather than the pure power of the single-wing. Teams would often adopt the Notre Dame Box if they lacked a true "triple threat" tailback, necessary for effective single-wing use. Rockne's innovations with this formation involved using complicated backfield shifts and motion to confuse defenses, and adapting it as a passing formation. The formation was originally designed as a brute-force running formation, since it had 7 players to one side of the center and only 2 on the other.