Hervey attended Compton High School, where he played as a quarterback and wide receiver. He was selected to the All-Moore League team as a senior. In track, he helped the school win the California state 4 × 400 metres relay competition. He moved on to Pasadena City College, where he played as a quarterback. As a freshman, he posted 12-of-28 completion for 116 yards and one touchdown, while rushing for 137 yards on 26 carries. Hervey became a starter in 1992, registering 78-of-143 completions for 919 passing yards, 3 passing touchdowns, 791 rushing yards on 169 carries and 8 rushing touchdowns on his way to a 10-1 record. He was named the MVP of the Rose City Classic Bowl, as he ran for one touchdown and passed for another in a 28-27 win over the College of the Desert. He also received Junior College All-State and All-Mission Conference honors. In track, he finished second in the 1992 California state community college 200 metres with 20.99 seconds and 400 metres with 46.41 seconds. As a sophomore, he recorded 20.65 seconds in the 200 metres and 46.02 seconds in the 400 metres, receiving South Coast Conference Track Male Athlete of the Year honors, after winning both events at the conference championships. He transferred to the University of Southern California after his sophomore season and was converted into a wide receiver. He was considered the team's fastest player, with head coach John Robinson, saying Hervey was the fastest player he had seen on a football field, including ex-Ram and Olympic 4 × 400 metres relay gold medalistRon Brown. As a junior he was named a starter, but tallied only 22 receptions for 219 yards and a 15-yard touchdown pass, after suffering a sprained left ankle that forced him to miss 2 games and would limit him the rest of the season. The next year, he suffered a right knee sprain in the season opener and would only play in 8 games, finishing his college career with 41 receptions for 482 yards and 3 touchdowns. He was a teammate of All-American wide receivers Johnnie Morton and Keyshawn Johnson. In track as a senior, he earned All-American honors in three events at the NCAA Track and Field Championships. He finished fifth in the 200 metres with 20.53 secondsÑ; his best was a 20.40 seconds time at the Pac-10 championships, where he was third. He also ran the second leg on both the 4 × 100 metres and 4 × 400 metres relay teams that finished fourth and fifth respectively.
Hervey was selected in the fifth round of the 1995 NFL Draft by the Dallas Cowboys. As a rookie, he was leading the team in kickoff returns during the preseason, until fracturing his left fibula in the final week of training camp. Although he returned on September 6, he was declared inactive for every game during the season, as the Cowboys went on to win Super Bowl XXX. He was waived on August 20, 1996.
On February 13, 1998, he was signed by the Denver Broncos and released before the season started.
Oakland Raiders (second stint)
In 1998, he was signed by the Oakland Raiders and waived on August 26.
Edmonton Eskimos
Hervey played eight seasons for the Edmonton Eskimos in the Canadian Football League, and was a CFL all star in 2001 and 2003. Over the course of his career Hervey posted 6715 yards receiving with 476 receptions in 118 career CFL games. In 2001, he had his best season stats-wise, when he registered 1447 yards on 77 receptions with 12 touchdowns. He was also a part of two Grey Cup winning teams. In 2006, he received the David Boone Memorial Award in recognition for his contributions to the community.
Front office career
On March 20, 2007, Hervey officially announced his retirement from professional football. He served as the Eskimos' head scout until December 10, 2012, when he was named as the club's general manager. In 2015, the Eskimos won the Grey Cup. On April 7, 2017, the Eskimos held a press conference to announce the termination of Hervey's contract. On November 30. 2017, Hervey was named the general manager of the BC Lions. Hervey's 2019 Lions missed the playoffs, and Hervey's handpicked head coach DeVone Claybrooks was fired after his first season on the job. Furthermore, Hervey's conduct during the season was criticized. His handling of the release of fan favorite and star linebacker Solomon Elimimian drew criticism from Elimimian's agent for its timing, as did Hervey's justification that he knew when a player's time was up; Elimimian still earned divisional All-Star honours for the season, and recorded a sack in each game he played against BC. Also during the season, Hervey was called out by the press for his refusal to shake the hand of Edmonton wideout Kenny Stafford.