LaVar RaShad Arrington (born June 30, 1978) is an American former professional football player who was a linebacker for seven seasons in the National Football League (NFL). He played college football for the Penn State Nittany Lions and was selected with the second overall pick by the Washington Redskins of the 2000 NFL draft. He was also a member of the New York Giants.

Arrington was born in Pittsburgh. He played linebacker and running back at North Hills High School in Pittsburgh. After his senior year, he was named the 1996 Parade National Player of the Year, Bobby Dodd National High School Back of the Year the Gatorade Player of the Year and USA Today Pennsylvania Player of the Year. He became the second player in Pennsylvania Class 4-A history to rush for more than 4,000 career yards, with 4,357 on 711 carries and 72 touchdowns. He played in the 1997 Big 33 Football Classic, the annual game between Pennsylvania and Ohio's best high school football players. In basketball, he was recruited to play basketball for Georgetown, UMass, and North Carolina.

Also a standout sprinter, Arrington was on the school's track and field team, where he recorded personal-best times of 10.85 seconds in the 100 meters and 23.14 seconds in the 200 meters. He also had top-jumps of 1.96 meters in the high jump and 6.76 meters in the long jump.

He was inducted into the WPIAL Hall of Fame on June 24, 2011.

While attending Penn State University, Arrington played for coach Joe Paterno's Nittany Lions teams from 1997 to 1999. His signature play with the Nittany Lions came during a game against Illinois. On a fourth and short yardage play, Arrington anticipated the snap count and jumped over the offensive line to tackle the runner in the backfield. The play became known as "The LaVar Leap". Arrington's tendency for spectacular plays and his cover appearance on the Sports Illustrated 1999 College Football Preview Issue led many to mention him as a possible Heisman Trophy candidate. Arrington received several honors during his college career, including the Chuck Bednarik Award, Dick Butkus Award, and Lambert Award in 1999. He was an All-Big Ten selection, a first-team All-American in 1998, and a consensus first-team All-American in 1999. Arrington finished ninth in balloting for the 1999 Heisman Trophy. He left Penn State after his junior season to enter the NFL draft.

On December 11, 2014, the Big Ten Network included Arrington on "The Mount Rushmore of Penn State Football", as chosen by online fan voting. Arrington was joined in the honor by John Cappelletti, Jack Ham, and Shane Conlan.

The Washington Redskins chose Arrington with the second overall pick, in the 2000 NFL draft, and he played for the Redskins from 2000 to 2005. After four seasons with the Redskins, Arrington signed an eight-year, $68 million contract extension. His agent Carl Poston was accused of neglecting to inspect the final revision of the contract, in which $6.5 million worth of bonuses contained in earlier drafts were missing. Poston was eventually suspended for two years by the National Football League Players' Association (NFLPA) over the mishandling of Arrington's contract; Arrington did not support the NFLPA's decision. Arrington's final two seasons with the Redskins was marred by knee injuries and conflicts with coaches Joe Gibbs and Gregg Williams. In March 2006 Arrington paid the Redskins $4.4 million to buy his free agency.

In April 2006, Arrington agreed to a seven-year, $49 million contract with the New York Giants. He was injured in week 7 against the Dallas Cowboys and missed the rest of the season with a ruptured Achilles tendon. On February 12, 2007, he was released by the New York Giants.