Troy Aikman was the first-overall pick in the 1989 draft, and he would go on to lead the Cowboys to three Super Bowl titles and was MVP of Super Bowl XXVII. He retired after the 2000 season. (AP Photo/Marc Serota)

Raymond Berry formed a fearsome combination with quarterback Johnny Unitas during his time with the Baltimore Colts (1955-1967). (National Football League)

Michael Irvin was a member of three Super Bowl champions during his time with the Cowboys (1988-1999). (National Football League)

Fred Biletnikoff caught 589 passes for 8,974 yards and 76 touchdowns during his 14-year career with the Oakland Raiders from 1965 through 1978. (AP Photo)

Dan Fouts became just the third player in NFL history to surpass 40,000 passing yards during his time with the Chargers (1973-1987). (AP Photo)

Lynn Swann was the Steelers' first-round pick in 1974 and won four Super Bowls with the Steelers during his career (1974-1982). (National Football League)

Art Shell was selected to eight Pro Bowls during his Raiders career (1968-1982) and even went on to coach the team on two separate occasions. (National Football League)

Dick Butkus was one of the most-feared and hard-nosed players in the NFL, though his career (1965-1973) was cut short because of a knee injuries. (National Football League)

Anthony Munoz was elected to 11 Pro Bowls during his career in Cincinnati (1980-1992). (National Football League)

Walter Payton set the NFL career rushing record with 16,726 yards during his long career with the Bears (1975-1987). (National Football League)

John Hannah was called the greatest lineman of all-time by Sports Illustrated during his time with the Patriots (1973-1985). (National Football League)

Dan Marino is considered by many to be the greatest quarterback in NFL history, recording the most fourth-quarter comebacks of anybody during his career in Miami (1983-1999). (National Football League)

Merlin Olsen was the Rams' first-round draft pick in 1962 and he grew to great prominence as a member of the famed "Fearsome Foursome" until he retired in 1976. (National Football League)

Jim Brown might not just be the greatest running back of all-time, but maybe the game's best player ever. He played for the Browns from 1957-1965. (National Football League)

Mean Joe Greene was a force on the defensive line for the Steelers after being the team's No. 1 draft pick in 1969. He retired in 1981. (National Football League)

Howie Long was selected to eight Pro Bowls during his career with the Raiders (1981-1993), which spanned two cities. (National Football League)

Don Hutson was the dominant receiver of his era with the Packers (1935-1945). (AP Photo/ John Lindsay)

Otto Graham led the Browns to 10 consecutive championship game appearances during his tenure in Cleveland (1946-1955). (AP Photo/Julian C. Wilson)

Frank Gifford excelled as both a halfback and a flanker for the New York Giants (1952-1960, 1962-1964) and was the 1956 MVP. (AP Photo/Rooney)

Paul Hornung won the Heisman Trophy with Notre Dame and then went on to be one of the catalysts for the Packers (1957-1962, 1964-1966) during the Lombardi era. (AP Photo/DVN)

Gale Sayers scored a rookie-record 22 TDs and 132 points during his rookie season in 1965 and remained with the Bears until his retirement in 1971. (Pro Football Hall of Fame)

Roger Staubach won the Heisman Trophy in 1963, and after a four-year tour with the U.S. Navy joined the Cowboys in 1969 and led the team to two Super Bowl wins before retiring after the 1979 season. (AP Photo/Charles Bennett)

John Stallworth played for the Pittsburgh Steelers for 14 seasons from 1974 through 1987, and set club records for receptions (537), yards (8.723) and touchdowns (63). (AP Photo)

Terry Bradshaw was the top pick in the 1970 draft, and he would go on to lead the Steelers to four Super Bowl titles until his retirement after the 1983 season. (AP Photo)

Ozzie Newsome retired as the all-time leader for tight ends with 662 receptions 7,980 yards and 47 TDs, and his career with the Browns stretched from 1978 to 1990. (AP Photo/Mark Duncan)

Derrick Thomas was the fourth overall draft selection of the Chiefs in 1989 and was selected to nine Pro Bowls during his career (1989-1999). (AP Photo/Bob Galbraith)

Many thought Barry Sanders called it quits way too early after he retired in 1998. The No. 3 overall pick in 1989 led the NFL in rushing four times. (AP Photo/Tom DiPace)

Jack Youngblood was the Los Angeles Rams' No. 1 draft pick in 1971, he became a starter in 1973, playing in 201 consecutive games, including competing in Super Bowl XIV with a broken leg. (National Football League)