Hart attended South Sumter, where he practiced football and baseball. In football, he was the team's starter at quarterback and safety.
Because of his SAT low score, he didn't receive football college scholarships offers except for an interest to play college football at Central Florida, he turned it downed instead deciding to play baseball at Central Florida.[4] He did not play college football.[5] He was selected by the Anaheim Angels in the 32nd round of the 2000 Major League Baseball Draft.[6]
In 2003, Hart was able to make the roster and started 9 games at safety due to an injury to starter Brian Dawkins. On September 14, 2004, the Eagles waived him.
San Diego Chargers
On September 15, 2004, Hart was claimed off waivers by the San Diego Chargers. Hart played in 14 games for the Chargers in 2004 and was tied with Hanik Milligan for the team lead with in special teams tackles with 15.
In 2005, Hart started 5 of 16 games and recorded 45 tackles and an interception. He also scored two touchdowns on an interception return and an interception by Donnie Edwards who lateralled to him for the score. In 2006, he started one of 16 games, recording 48 tackles and three interceptions.
In 2007, Hart became the Chargers full-time starter at strong safety, starting all 16 games. He finished the season recording a career-high five interceptions and 85 tackles.
On April 7, 2008, the Chargers signed Hart to a five-year extension through 2012.[7] During the 2008 season, he remained the Chargers starter at strong safety, starting in all 14 games he played. He finished the season with 63 tackles and 0 interceptions.
Hart was cut from the Chargers on October 14, 2009.[8]
St. Louis Rams
Hart was signed by the St. Louis Rams on December 8, 2009. He wasn't re-signed after the season.
On April 28, 2010, it was reported he was arrested for the battery of his wife after she discovered a female chatting with him on Facebook.[9]
In 2017, Hart took the position of Defensive Coordinator at Ocala Christian Academy in Ocala, Florida.
His younger brother, Keanu Neal, played college football at Florida Gators football as a safety and was a 2016 NFL draft prospect selected #17 overall by the Atlanta Falcons.[10]