Wisconsin's Stephanie Lombardo brought May Madness to the Norman Regional in Saturday's closing hour.
With runners on the corners and Wisconsin trailing Notre Dame 4-2 with one out remaining, Lombardo launched a pitch over the wall in left-center field for a walk-off 5-4 victory.
The Badgers scored all five of their runs in the bottom of the seventh. They had collected just two hits in the six prior innings.
Wisconsin will face No. 1 seed Oklahoma in the regional championship at 1 p.m. Sunday. If the Badgers win, there will be another game at 3:30 p.