Gale Sayers has passed away at the age of 77 after living with dementia.

Sayers was voted into the Pro Football Hall of Fame in 1977 at the age of 34 after seven seasons  with the Chicago Bears.

"All those who love the game of football mourn the loss of one of the greatest to ever play this game with the passing of Chicago Bears legend Gale Sayers," Hall of Fame president and CEO David Baker said in a statement. "He was the very essence of a team player -- quiet, unassuming and always ready to compliment a teammate for a key block. Gale was an extraordinary man who overcame a great deal of adversity during his NFL career and life."

Sayers was a five-time All-Pro who averaged 5 yards per carry for his career and twice led the league in rushing, including in 1969 (1,032 yards) after having torn the ACL and MCL in his right knee late in the previous season.