Northwestern softball, winners of 17 of their previous 19 games, entered its weekend series against No. 15 Minnesota looking to extend its undefeated conference streak. Instead, the Wildcats left the Twin Cities with three straight losses. A 3-2 Notre Dame walkoff win on Wednesday makes Northwestern’s (20-15, 8-3 B1G) upcoming series at Nebraska (23-18, 10-4) a pivotal one in the