Washington Redskins Hall of Fame running back Bobby Mitchell. (National Football League)

Washington Redskins Hall of Fame running back Bobby Mitchell (49) runs around Los Angeles Rams linebacker Jack Pardee (32). (Associated Press)

Cleveland Browns rookie running back Bobby Mitchell (49) poses during a photo session at the Browns training camp at Hiram College, Hiram, Ohio, Aug. 2, 1958. (National Football League)

Cleveland Browns running back Bobby Mitchell (49) races upfield during game against the New York Giants in Cleveland, Ohio, Oct. 14, 1956. Giants won, 21-9. (Associated Press)

Bobby Mitchell, Cleveland Browns halfback and Milt Plum (16) during action against the Eagles, Nov. 1961 in Cleveland, Ohio. Browns beat the Eagles 45-24. (Associated Press)

Washington Redskins Hall of Fame running back Bobby Mitchell (49) takes the hand off from Washington Redskins Hall of Fame quarterback Sonny Jurgensen (9). (Associated Press)

Washington Redskins Hall of Fame wide receiver Bobby Mitchell in 1966. (National Football League)

Former Washington Redskins Assistant General Manager Bobby Mitchell, left, looks on as fellow hall-of-famer Kellen Winslow, executive director of the Fritz Pollard Alliance, holds a "Bobby Mitchell, number 49" jersey during a Washington news conference Friday, March 14, 2003 honoring Mitchell with the organization's inaugural Paul "Tank" Younger Award for his 44 years of service in the NFL. In 1963, Mitchell became Washington's first black player, fully integrating the NFL's 12 teams. (AP Photo/Evan Vucci)

Standing from left to right, Leroy Kelley, Bobby Mitchell, and Jim Brown, stand behind Gene Hickerson at the Pro Football Hall of Fame, Saturday, Aug. 4, 2007, in Canton, Ohio. (AP Photo/Tony Dejak)

Hall of Fame receiver Bobby Mitchell waves during the Cleveland Browns Ring of Honor ceremony at halftime of an NFL football game against the Kansas City Chiefs Sunday, Sept. 19, 2010, in Cleveland. (AP Photo/Mark Duncan)

Former Washington Redskins player Bobby Mitchell is honored during pregame player introductions during the NFL week 9 football game against the San Francisco 49ers on Sunday, November 6, 2011 in Landover, Maryland. The 49ers won the game 19-11. (AP Photo/Paul Spinelli)