Arthur Jones is dead at 39.

The brother of former UFC heavyweight titleholder Jon Jones, who won a Super Bowl ring with Baltimore Ravens by defeating the San Fransisco 49ers at Super Bowl 47, retired after the 2017 season following seven years in the NFL, which included stints with Indianapolis Colts and Washington Redskins.

“We are terribly saddened to learn of Arthur Jones’ sudden passing,“ NFL General Manager, Eric DeCosta, wrote on social media. ”Arthur’s presence was a gift to everyone he encountered. His big, bright smile, infectious energy and eternal positivity created a presence that continuously uplifted others.“

“He was kind, courteous and enthusiastic — always displaying a love for family, teammates and friends,” DeCosta added. “We send our deepest condolences to the Jones family and all who loved Arthur.“

A cause of death was not revealed.

“Bones” has yet to issue a statement on the unfortunate passing of his brother.