Apr 08, 2021; Pittsburgh, PA, USA; Apr 8, 2021; Pittsburgh, PA, Minn. Duluth Bulldogs defenseman Louie Roehl (6) and goaltender Zach Stejskal (35) defend a tip in attempt by Massachusetts Minutemen forward Cal Kiefiuk (7) during the second period in the semifinals of the 2021 Frozen Four NCAA hockey tournament at PPG Paints Arena. Mandatory Credit: Charles LeClaire-Imagn Images; Mandatory Credit: Charles LeClaire-Imagn Images