The self-proclaimed "itty bitty guy, Green was nicknamed the "Ageless Wonder" by his peers and the general media for his remarkable ability to maintain a high level of play well into the twilight of his career. Green was also known for his speed and was one of the fastest players in the history of the NFL.
Green's all-time collegiate best in the 100 was 10.08, 20.50 in the 200 and 45.90 in the 400. He was named the most valuable track performer at the 1982 and 1983 Lone Star Conference Championships. He won gold medals at the LSC meet in the 100-meter dash in 1981, in the 100-meter and 200-meter dashes in 1982 and in the 100-meter and 200-meter dashes in 1983. As a sophomore in college, Green defeated future multiple time Olympic gold medal winner Carl Lewis in the 100 meter dash. Lewis never raced Green again.
Green was named to the NCAA Division I All-America roster in 1981 and 1982, and was on the NCAA Division II All-America team in five events in 1981 and 1982. He was NAIA All-America in 1981 and 1982 in four events.
Green was also successful in the 1990s. In 1997, Green returned an interception 83 yards for a touchdown against the Philadelphia Eagles, which was the longest return of his career. Then on December 13, 1997, he played in his 217th career game as a Redskin, breaking Monte Coleman's record for games played. In a 1999 game against the Arizona Cardinals, he intercepted his 50th NFL pass against the Jake Plummer at FedExField. In his last game on December 29, 2002, Green and the Redskins defeated the Dallas Cowboys 20-14 at FedExField. During the game, he returned a punt on a reverse from Champ Bailey for 35 yards which is the longest gain of any kind for a player his age (42 years, 327 days).
Green retired after the 2002 season at the age of 42, the oldest Redskin, having played for six head coaches: Joe Gibbs, Richie Petitbon, Norv Turner, Terry Robiskie, Marty Schottenheimer and Steve Spurrier. Green and former Los Angeles/St. Louis Rams offensive lineman Jackie Slater are the only players in NFL history to play for the same team for 20 seasons.
In his 20 NFL seasons, Green recorded 54 interceptions, which he returned for 621 yards and six touchdowns. He also added two additional touchdowns on interception returns in the post season. Three times he recorded a career-best of five interceptions in a season (1984, 1986, and 1991). Green also returned 51 punts for 611 yards and recovered 10 fumbles, returning them for 131 yards and two touchdowns. Also known for staying healthy, he missed just 25 games throughout his career. He is the four-time winner of the NFL's Fastest Man competition, and the only undefeated multiple winner in NFL history. In addition, Green ran the fastest verified (albeit unofficial) 40 yard dash to date, doing so in 1986 at Redskin training camp in Carlisle, Pennsylvania with a time of 4.09. Then, at age 40, he was clocked in a hand-held time of 4.24 in the 40 yard dash.
Green was with the Redskins for their victories in Super Bowls XXII and XXVI, and started in their loss to the Los Angeles Raiders in Super Bowl XVIII. Green recorded an interception in Super Bowl XXVI and a then-record 34-yard punt return in Super Bowl XVIII.
Green was named All-Pro in 1986, 1987, 1990, and 1991 and was voted to seven Pro Bowls. He is a member of the National Football League 1990s All-Decade Team as well as winning all four NFL Fastest Man competitions he participated in. His pre-grame rituals included eating and sticking Tootsie Rolls in his sock claiming that the candy helped him run fast.
In addition, he served as a board member for the Baltimore-Washington 2012 Summer Olympics Bid, NFL/NFLPA September 11th Relief Fund, and the Loudoun Education Foundation. In 2003, he was selected to serve as the Chair of President Bush’s Council on Service and Civic Participation. He currently sits on the boards of the Wolf Trap Foundation as its National Spokesman for Education and Marymount University.
Green has received honorary Doctorates of Humane Letters from Marymount University in 1999, and St. Paul's College and George Washington University in 2002.
In 2004, Green was inducted into the College Football Hall of Fame and was inducted into the Pro Football Hall of Fame on August 2 2008. His fellow Hall of Fame classmates include former Redskins teammate Art Monk, and his former position coach Emmitt Thomas. Green has been also been inducted into the NCAA Division II Hall of Fame, the Texas Sports Hall of Fame, the Lone Star Conference Hall of Honor and the Javelina Hall of Fame.
In December 2007, Green was voted the All-Time Redskins Legend in a WUSA-TV Channel 9 online poll.