Former Cleveland Browns star Bobby Mitchell died Sunday afternoon at the age of 84, the Pro Football Hall of Fame announced, calling him "a true legend."

Mitchell, a halfback and flanker who played 11 seasons for the Browns (1958-61) and Washington Redskins (1962-68), was enshrined into the Pro Football Hall of Fame in 1983. He was named All-NFL three times and played in four Pro Bowls.

It was unclear exactly how he died.

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“The entire Pro Football Hall of Fame family mourns the passing of Bobby Mitchell," Hall of Fame president and CEO David Baker said in a statement. "The game lost a true legend today. Bobby was an incredible player, a talented executive and a real gentleman to everyone with whom he worked or competed against. His wife Gwen and their entire family remain in our thoughts and prayers.

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"The Hall of Fame will forever keep his legacy alive to serve as an inspiration to future generations.”

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The Hall of Fame flag on the museum’s campus will be flown at half-staff in Mitchell’s memory.