MILWAUKEE – St. Norbert College returned to the softball diamond and split a Northern Athletics Collegiate Conference doubleheader with Alverno College, winning the opener 19-3 before dropping the nightcap 5-4. The Green Knights fell behind early in the opener when Alverno scored once in the first inning, but then got a run back in the second on Lilly Haase’s RBI single. St. Norbert scored four times in the top of the third, paced by Baleigh Linssen’s three-run home run. Andrianna Volz’s RBI single gave St. Norbert a 5-1 lead. Alverno got a run in the third to cut it to…