Campbell grew up in Cheltenham Township, a township on the northernborder of Philadelphia and attended Cheltenham public schools through 8th grade. Campbell then attended Chestnut Hill Academy in Philadelphia, Pennsylvania for high school, where he starred as both a running back and defensive back. He rushed for 3,857 yards and 52 touchdowns during his career at running back. As a defensive back, he totalled 135 tackles and nine interceptions. He earned All-league, All-state, All-Southeastern Pennsylvania and All-city honors and was named to the Philadelphia Daily News' All-Decade team as a defensive back. He was named the Blue Devils' Offensive MVP. He had 1,885 yards and 28 touchdowns his senior season. He scored the game-winning TD vs. Haverford with a run in overtime that lifted CHA to the league championship. He was selected to play in Philadelphia's City All-Star game and Pennsylvania's East-West All-Star game, and was voted CHA's "Top Senior Athlete" in 2009–10. Also a letterman in track & field, mostly in sprints and hurdles. He posted bests of 7.21 seconds in the 60 meters, 11.19 in the 100 meters, 8.60 in the 60m hurdles, 14.57 in the 110m hurdles and also 6.71 meters in the long jump. Campbell was rated by Rivals.com as a three-star recruit. He committed to Northwestern University to play college football.
College career
Campbell accepted a football scholarship from Northwestern University. As a redshirt freshman, he became a starter at safety, posting 100 tackles, 3.5 tackles for loss, 2 interceptions, 4 passes defensed and one fumble recovery. As a sophomore, he was one of the leaders of the defense, registering 89 tackles, one interception and 12 passes defensed. As a junior, he tallied 74 tackles, 2.5 tackles for loss, 1 sack, 4 interceptions and one fumble recovery. As a senior, he collected 54 tackles, one tackle for loss, 3 interceptions. He finished his college career with 45 starts, 316 tackles, 7.5 tackles for loss, 11 interceptions, 24 passes defended, one sack and one fumble recovery.
Professional career
Cleveland Browns
Campbell was selected by the Cleveland Browns in the fourth round of the 2015 NFL Draft. On May 19, Campbell signed a four-year, $2.79 million contract with the Browns with a $512,010 signing bonus. In 2016, he started 8 games at strong safety. In 2017, he appeared in 8 games, before being waived/injured by the Browns and placed on the injured reserve list on November 9. He was released with an injury settlement on November 16.
On October 24, 2018, Campbell was signed by the New York Jets. He was waived on November 2, 2018.
Green Bay Packers
On November 5, 2018, the Packers claimed Campbell off waivers to shore up the secondary after trading Ha Ha Clinton-Dix to the Washington Redskins. He was placed on injured reserve on December 4, 2018. On August 8, 2019, Campbell was re-signed by the Packers. He was placed on the reserve/PUP list on August 31, 2019. He was activated off PUP on November 5. He made his 2019 debut on November 10 in a Week 10 victory over the Carolina Panthers, recording three solo tackles and a forced fumble.
Tennessee Titans
On May 1, 2020, Campbell was signed by the Tennessee Titans.
