Jones was a standout at both football and basketball in high school at Amanda Elszy in Greenwood, Mississippi. He led his teams to multiple championships.
College career
Jones attended Norfolk State University, where he was the center on three Central Intercollegiate Athletic Association tournament basketball teams. He was named to the All-CIAA Tournament team each year. As a sophomore in 1972, he was named to the Associated Press All-State first team, and was named to the second team as a junior. Jones also played football, and he was named All-CIAA annually as a defensive end. Before the 1973 football season, Jones learned he would be academically ineligible to play due to poor grades. He dropped out of Norfolk State and signed a three-year contract to play football professionally in Canada.
Professional career
In 1974, Jones played for the Edmonton Eskimos in the Canadian Football League. He led the team in tackles and sacks that season, as well as in the 62nd Grey Cupchampionship game. The Eskimos the next season won the 63rd Grey Cup with Bill Stevenson taking over Jones' left defensive end position. Having left Norfolk State early, Jones was not eligible for the 1974 NFL draft. In the summer of 1973, pro scouts had projected him as a first-round pick in 1974, rating him near or on par with Ed "Too Tall" Jones, who became the first overall pick in 1974. Ruled eligible by the NFL the following year, Leroy Jones was selected in the 1975 draft in the second round with the 48th overall pick by the Los Angeles Rams. The San Diego Chargers acquired Jones from the Rams in 1976 for a future draft choice. In 1980, Jones teamed with All-Pro's Fred Dean, Gary "Big Hands" Johnson, and Louie Kelcher on the defensive frontline as the Chargers led the NFL in sacks. The foursome was locally nicknamed the Bruise Brothers. Jones that season had 11 sacks, second on the team behind Johnson's, and was named an alternate for the Pro Bowl. Don "Air" Coryell's Chargers teams of that era are mostly remembered for its high-scoring, pass-oriented offense. The Chargers won the AFC West from 1979–1981 and made the playoffs in 1982. During the 1981 season, Jones blocked a 35-yard field goal by Miami kicker Uwe von Schamann at 11:27 into overtime, allowing San Diego to drive for its own field goal and win 41–38 in the playoff game known as the Epic in Miami, considered by many to be among the greatest NFL games ever.