A quarterback is a position in American and Canadian football. Quarterbacks are members of the team and line up directly behind the offensive line. In modern American football, the quarterback is considered the leader of the offensive team. In modern American football, the quarterback is usually the leader of the offense, the quarterback touches the ball on almost every offensive play, and his successes and failures can have a significant impact on the fortunes of his team. Accordingly, the quarterback is among the most glorified and scrutinized positions in team sports, prior to each play, the quarterback will usually tell the rest of his team which play the team will run. After the team is lined up, the center will pass the ball back to the quarterback, usually on a running play, the quarterback will then hand or pitch the ball backwards to a half back or full back. On a passing play, the quarterback is almost always the responsible for trying to throw the ball downfield to an eligible receiver downfield. Depending on the scheme by his team, the quarterbacks role can vary. While quarterbacks in Canadian football need to be able to throw the ball often, in the NFL, quarterbacks are required to wear a uniform number between 1 and 19. In the CFL, the quarterback can wear any number from 0 to 49 and 70 to 99. Because of their numbering, quarterbacks are eligible receivers in the NCAA, NFHS, after a Super Bowl victory, the starting quarterback is the first player to be presented with the Vince Lombardi Trophy. The starting quarterback of the victorious Super Bowl team is chosen for the Im going to Disney World. Campaign, whether they are the Super Bowl MVP or not, examples include Joe Montana, Trent Dilfer, Dilfer was chosen even though teammate Ray Lewis was the MVP of Super Bowl XXXV, due to the bad publicity from Lewis murder trial the prior year. In addition to their role, quarterbacks are occasionally used in other roles. Most teams utilize a backup quarterback as their holder on placekicks, in the Wildcat, a formation where a halfback lines up behind the center and the quarterback lines up out wide, the quarterback can be used as a receiving target or a blocker. A more rare use for a quarterback is to punt the ball himself, Denver Broncos quarterback John Elway was known to perform quick kicks occasionally, typically when the Broncos were facing a third-and-long situation. As Roger Staubachs back-up, Dallas Cowboys quarterback Danny White was also the teams punter, ascending the starting role upon Staubachs retirement, White held his position as the teams punter for several seasons—a double duty he performed to All-American standard at Arizona State University. White also had two touchdown receptions as a Dallas Cowboy, both from the halfback option, if quarterbacks are uncomfortable with the formation the defense is using, they may call an audible change to their play
Mike Quinn, former Dallas Cowboys quarterback, throwing the football.
Navy quarterback Craig Candeto pitches the ball while running an option-based offense.
QB Aaron Rodgers (12) and the Green Bay Packers breaking the huddle.