Jon Steven Young is an American former football quarterback who played in the National Football League (NFL) for 15 seasons, most notably with the San Francisco 49ers. He was drafted by and played for the Tampa Bay Buccaneers. Prior to his NFL career, Young was a member of the Los Angeles Express in the United States Football League (USFL) for two seasons. He played college football for the BYU Cougars, setting school and NCAA records en route to being runner-up for the 1983 Heisman Trophy.

The quarterback, colloquially known as the "signal caller", is a position in gridiron football. Quarterbacks are members of the offensive platoon and mostly line up directly behind the offensive line. In modern American football, the quarterback is usually considered the leader of the offense, and is often responsible for calling the play in the huddle. The quarterback also touches the ball on almost every offensive play, and is almost always the offensive player that throws forward passes. When the QB is tackled behind the line of scrimmage, it is called a sack.