The curved bar that supports the crossbar and goal posts on an American football field. Named for Phil Dawson, the Cleveland Browns placekicker who struck the center support (an odd occurrence) twice in one season -- once for a game-tying field goal and once from 49 yards away in a blizzard. A kick that strikes the Dawson Bar is a successful try, even if the ball rebounds and falls in front of the crossbar.
That kick is good! It hit the Dawson Bar before it bounced out!