The Charlton Brothers, Bobby and Jackie played against each other in the old first division. Bobby for Man Utd and Jackie for Leeds Utd.
i belive Eli and payton are the only brothers who have played against each other as starting nfl qbs
Manchester Utd. have more combined wins than Celtic do since the first time they played each other , in which Celtic won the first match between the two.
They would have played against each other, so they would know each other.
They have all played each other after AFL/NFL merge
No. They have played against each other in regular season games, but never in a Super Bowl.
The Pittsburgh Steelers and the Arizona Cardinals.
Barcelona and Manchester United have played against each other eleven times total. Both teams have been fairly equally matched.