Lamar Demeatrice Jackson Jr. is an American football quarterback for the Baltimore Ravens of the National Football League (NFL). He played college football for the Louisville Cardinals, where he won the Heisman Trophy in 2016, and was selected by the Ravens with the final pick in the first round of the 2018 NFL draft. Jackson became the Ravens' starting quarterback in his rookie season after an injury to incumbent Joe Flacco and clinched a division title with the team, also becoming the youngest NFL quarterback to start a playoff game at age 21.

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.