Domenik Hixon has suffered another torn ACL, which will effectively end his career.
Hixon signed a one-year deal with the Chicago Bears in March after one season with the Carolina Panthers.
"I tore my ACL today for the third time today!" Hixon wrote. "I'm disappointed that I won't be playing for a Bears team that has the players and coaches to win the Super Bowl. I thank God for letting me live my dream of playing in the NFL for 8 years plus. It has truly been fun!"