Jon Gruden back in professional football, joins Arena Football One League team's ownership group / Jon Gruden returning to football: Super Bowl-winning coach joins Nashville arena team as part-owner / Jon Gruden recalls hilarious Peyton Manning jab after ill-advised play call / Tampa Bay Buccaneers to reinstate Jon Gruden into Ring of Honor / Buccaneers reinstate Jon Gruden to franchise Ring of Honor / The Tampa Bay Buccaneers say they're reinstating Jon Gruden into their ring of honor / Buccaneers announce Jon Gruden will be reinstated into Ring of Honor / Buccaneers reinstate Jon Gruden to team's Ring of Honor four years after removing former head coach / Bucs to reinstate Jon Gruden into Ring of Honor / Raiders owner Mark Davis says Jon Gruden's resignation set organization back: 'His head was chopped off'