burn up the remaining time on the clock without risking a turnover or injury. Dual-threat quarterbacks A dual-threat quarterback possesses the skills and physique to run with the ball if necessary. With the rise of several blitz-heavy defensive schemes and increasingly faster defensive players, the importance of a mobile quarterback has been redefined. While arm power, accuracy, and pocket presence—the ability to successfully operate from within the "pocket" formed by his blockers—are still the most important quarterback virtues, the ability to elude or run past defenders creates an additional threat that allows greater flexibility in a team's passing and running game. Dual-threat quarterbacks have historically been more prolific at the college level. Typically, a quarterback with exceptional quickness is used in an option offense, which allows the quarterback to hand the ball off, run it themself or pitch it to a running back shadowing them to the outside. This type of offense forces defenders to commit to the running back up the middle, the quarterback around the end or the running back trailing the quarterback. It is then that the quarterback has the "option" to identify which matchup is most favorable to the offense as the play unfolds and exploit that defensive weakness. In the college game, many schools employ several plays that are designed for the quarterback to run with the ball. This is much less common in professional football, except for a quarterback sneak, a play that involves the quarterback diving forward behind the offensive line to gain a small amount of yardage, but there is still an emphasis on being mobile enough to escape a heavy pass rush. Historically, high-profile dual-threat quarterbacks in the NFL were uncommon—among the notable exceptions were Steve Young and John Elway, who led their teams to one and five Super Bowl appearances respectively; and Michael Vick, whose rushing ability was a rarity in the early 2000s, although he never led his team to a Super Bowl. In the 2010s, quarterbacks with dual-threat capabilities have become more popular. Current NFL quarterbacks considered to be dual-threats include Russell Wilson, Lamar Jackson, and Josh Allen. Two-quarterback system Some teams employ a strategy that involves the use of more than one quarterback during the course of a game. This is more common at lower levels of football, such as high school or small college, but rare in major college or professional football. There are four circumstances