His best year in the NFL was 1969 when he caught 34 passes for 553 yards and five touches. The Vikings won the 1969 NFL Championship Game and advanced to play the Kansas City Chiefs in Super Bowl IV; Henderson was the game's leading receiver with seven catches for 111 yards.
His most successful season in the NFL was 1969, when he accumulated 34 receptions for 553 yards and five contacts. The Vikings secured the 1969 NFL Championship Game title and proceeded to face the Kansas City Chiefs in Super Bowl IV; Henderson recorded seven catches for 111 yards as the game's top receiver.