In American and Canadian football, a single-wing formation was a precursor to the modern spread or shotgun formation. The term usually connotes formations in which the snap is tossed rather than handed—formations with one wingback and a handed snap are commonly called "wing T" or "winged T". Created by Glenn "Pop" Warner, the single wing was superior to the T formation in its ability to get an extra eligible receiver down field. History Among coaches, single-wing football denotes a formation using a long snap from center as well as a deceptive scheme that evolved from Glenn "Pop" Warner's offensive style. Traditionally, the single-wing was an offensive formation that featured a core of four backs including a tailback, a fullback, a quarterback (blocking back), and a wingback. Linemen were set "unbalanced", with two on one side of the center and four on the other. This was done by moving the off-side guard or tackle to the strong side. The single-wing was one of the first formations attempting to trick the defense instead of over-powering it. Pop Warner referred to his new offensive scheme as the Carlisle formation because he formulated most of the offense while coaching the Carlisle Indians. The term single-wing came into widespread use after spectators noticed that the formation gave the appearance of a wing-shape. In 1907, Warner coached at Carlisle, a school for Native Americans, where his legacy consisted of at least three significant events. The first was the discovery of Jim Thorpe's raw athletic ability. The second was the use of an extensive passing game that relied on the spiraled ball. Finally, faking backs who started one way, but abruptly headed the opposite way, kept defenses guessing. Because Jim Thorpe had so much raw talent, Coach Warner more than likely designed much of his single-wing offense around this gifted athlete. Thorpe, the proverbial triple threat, was a good runner, passer, and punter. For much of the history of the single-wing formation, players were expected to play on both sides of the ball. Consequently, offensive players often turned around to play a corresponding location on defense. The offensive backs played defensive backs, just as the offensive linemen played defensive linemen. Unlike teams of today, single-wing teams had few specialists who only played on certain downs. College football playbooks before the 1950s were dominated with permutations of the traditional single-wing envisioned by Warner. Two-time All-American Jack Crain's handwritten