Leslie Herbert "Speedy" Duncan (August 10, 1942 – December 9, 2021) was an American professional football player who was a cornerback and return specialist in the American Football League (AFL) and National Football League (NFL). He played college football for the Jackson State Tigers. Duncan played seven seasons with the San Diego Chargers, where he was a three-time AFL All-Star. He was also named to the Pro Bowl with the Washington Redskins. Duncan was inducted into the Chargers Hall of Fame and was named to their 40th and 50th anniversary teams.
He was the first punt returner in AFL history to return two punts for touchdowns in a season. His punt returning was so feared in the AFL, that it altered the way in which teams punted. He led the AFL in punt return average twice and the NFL once. He was the first player in AFL history to return an interception 100 yards for a touchdown.
Duncan was born on August 10, 1942, in Tuscaloosa, Alabama. Duncan attended Druid High School in Tuscaloosa, where he starred on the football team. He was a halfback and kick returner. In a mid-October 1958 game against undefeated Howard High School of Chattanooga, Tennessee, the 156 lb (70.8 kg) junior Duncan scored five touchdowns, including rushing touchdowns of 40 and 70 yards, and a 50-yard touchdown reception. As a senior, he scored 26 touchdowns and led his team to an 11–0 record.
Duncan could not attend the University of Alabama when he graduated high school because of racial segregation. He attended Jackson State University, an HBCU school in Jackson, Mississippi. He played for the Tigers football team in the Southwest Athletic Conference (SWAC), and was a member of the track team. One of his football teammates was future NFL receiver Willie Richardson. Duncan was a halfback and kick returner on the football team. In an early December 1962 game against Tennessee A & I State University, he returned a punt 70 or 73 yards for a touchdown.
In both Duncan's sophomore and junior seasons (1961 and 1962), Jackson State was the Southwest Athletic Conference champion. Duncan averaged 43.2 rushing yards per game in 1962. As a sophomore, his coach had Duncan learn to tackle and play defense by having the team run at him. The Tigers defeated Florida A & M in the December 8, 1962 Orange Blossom Classic, making Jackson State that year's HBCU champion. Duncan figured prominently in the 22–6 Orange Blossom victory. He suffered a leg injury at the beginning of the 1963 season, but became one of the SWAC's top receivers as the season progressed, becoming a double threat running and receiving. Still, he missed seven games that season, hurting his chances to be drafted by a professional football team.
He was also a track star at Jackson State. He was the track team captain in 1962. Duncan acquired the nickname "Speedy" at Jackson State, after setting a record by running the 220-yard dash in 21 seconds.
Duncan was not drafted in 1964. He was signed as a free agent by Chargers scout Al LoCasale in April 1964, with the promise that he would only get a contract if he made the team. LoCasale was one of the AFL's original football executives. LoCasale had come to Jackson State's campus to scout other players, including Willie Richardson. In one version of events, Richardson recommended Duncan to LoCasale, who said Duncan was too small at 5 ft 6 in (1.68 m). Richardson said that was not the case, and Duncan was 5 ft 10 in (1.78 m). After LoCasale himself measured Duncan, he realized the rumors of Duncan's height were false, and signed Duncan for the Chargers.
In another version of the story, Duncan knew LoCasale was recruiting on campus and approached LoCasale, saying he wanted to become a professional player. LoCasale told Duncan that scouting reports said Duncan was too small, being only 5 ft 7 in (1.7 m). LoCasale measured Duncan himself, and found Duncan to be 5 ft 10.5 in (1.79 m), and signed him as a free agent. In either event, future Hall of Fame head coach Sid Gillman decided to keep Duncan on the team after seeing him run the 40-yard dash in 4.4 seconds, the fastest of any player in the Chargers' training camp; and intercepting two passes in a training camp scrimmage. Duncan later said there was a quota for the number of black players kept on a team, but he was determined to stand out and be among those selected.
As a rookie with the Chargers in 1964, Duncan was a reserve defensive back at safety. He was placed on the injured deferred list in late August, and only appeared in five games that season, with one interception. He returned nine kickoffs for 318 yards (35.3 yards per return), including a 91-yard kickoff return against the New York Jets on December 6. He also returned four punts for 19 yards.
In 1965, Duncan became a starter at cornerback in place of an injured Dick Westmoreland. He started 14 games at right cornerback, with four interceptions and two fumble recoveries. Duncan returned 30 punts for 464 yards, averaging 15.5 yards per punt return, leading the AFL in punt return yardage and average per return. Duncan also returned 26 kickoffs for 612 yards (23.5 yards per kickoff return), and led the AFL in combined kickoff and punt return yardage (1,076).
Duncan returned two punts for touchdowns in 1965. On September 26, 1965, he returned a punt 64 yards for a touchdown against the Kansas City Chiefs; the Chargers' only touchdown in a 10–10 tie. He also had a 63-yard punt return for a touchdown in the first quarter of a December 12 game against the Houston Oilers. This made him the first player in AFL history to have two touchdowns in a season on punt returns. Duncan was selected to play in the AFL All-Star Game after the 1965 season. He was named first-team All-AFL by the Newspaper Enterprise Association (NEA) and second-team All-AFL by the Associated Press (AP). The Chargers were 9–3–2 that season, losing to the Buffalo Bills in the AFL championship game, 23–0. Duncan had a 49 yard kickoff return in the championship game.
In 1966, Duncan started 13 games at right cornerback, with seven interceptions, fifth best in the AFL. He returned 18 punts for 238 yards, leading the AFL with a 13.2 yard per punt return average, with the third most returns in the AFL. He was second in the AFL in combined kickoff and punt return yardage. He returned 25 kickoffs for 642 yards (25.7 yards per kickoff return). He was once again selected to play in the AFL All-Star Game.
Duncan was named second-team All-AFL by the AFL, AP, and United Press International (UPI) for his performance in 1966. In the first game of 1966, Duncan had an 81-yard touchdown return of a punt against the Buffalo Bills. Duncan had three interceptions in a late-September 1966 game against the Oakland Raiders, tying a franchise record. The Associated Press named him the AFL's Defensive Player of the Week for that game.
In 1967, Duncan started all 14 games at right cornerback, with two interceptions and one fumble recovery. Duncan scored two touchdowns on defense in an October 15, 1967 game against the Kansas City Chiefs. He had an interception against future Hall of Fame quarterback Len Dawson, and returned it 100 yards for a touchdown; the longest touchdown return in AFL history at the time. Earlier in the same game, he recovered a Mike Garrett fumble and returned it 35 yards for another touchdown. That year, Duncan returned 36 punts for 434 yards, and nine kickoffs for 231 yards. His 12.1 yards per punt return was second in the AFL that season.
Duncan was selected to play in the AFL All-Star Game for a third consecutive year. During the January 1968 All-Star Game, he returned a kickoff 90 yards for a touchdown. He was named second-team All-AFL by The Sporting News, AP, and NEA.
In 1968, Duncan started eight games at right cornerback, with one interception. He injured and reinjured a thigh muscle during the season that limited his playing time. It was the worst injury in his life up to that time. He broke his own team record with a 95-yard touchdown punt return against the New York Jets on November 24. He also had a 53-yard kickoff return in the game. This was the last punt return for a touchdown in his career. That year, he returned 18 punts for 206 yards and 25 kickoffs for 586 yards. His 11.4 yards per return was third best in the AFL.