UMass tops two-time defending champion Minn. Duluth in semis

Minnesota Duluth goaltender Zach Stejskal (35) stretches to clear the puck against Massachusetts during the second period of an NCAA men's Frozen Four hockey semifinal in Pittsburgh, Thursday, April 8, 2021. (AP Photo/Keith Srakocic)

A puck shot by Massachusetts' Zac Jones whizzes past Jake Gaudet (18) and Minnesota Duluth goaltender Zach Stejskal for a goal during the first period of an NCAA men's Frozen Four hockey semifinal in Pittsburgh, Thursday, April 8, 2021. (AP Photo/Keith Srakocic)

Massachusetts' Bobby Trivigno (8) sends the puck past Minnesota Duluth goaltender Zach Stejskal (35), before Garrett Wait, not seen, knocked it in for an overtime goal in an NCAA men's Frozen Four hockey semifinal in Pittsburgh, early Friday, April 9, 2021. Massachusetts won 3-2 and will face St. Cloud State in the championship game Saturday. (AP Photo/Keith Srakocic)

Massachusetts' Garrett Wait (12) celebrates with Josh Lopina (10) and Ty Farmer (3) after scoring in overtime against Minnesota Duluth in an NCAA men's Frozen Four hockey semifinal in Pittsburgh, early Friday, April 9, 2021. Massachusetts won 3-2 and will face St. Cloud State in the championship game Saturday. (AP Photo/Keith Srakocic)

Massachusetts players gather around Zac Jones (24) after he scored against Minnesota Duluth during the first period of an NCAA men's Frozen Four hockey semifinal in Pittsburgh, Thursday, April 8, 2021. (AP Photo/Keith Srakocic)

Massachusetts' Zac Jones (24) is greeted by teammates after scoring against Minnesota Duluth during the first period of an NCAA men's Frozen Four hockey semifinal in Pittsburgh, Thursday, April 8, 2021. (AP Photo/Keith Srakocic)

Massachusetts' Garrett Wait (12) celebrates after scoring against Minnesota Duluth during overtime in an NCAA men's Frozen Four hockey semifinal in Pittsburgh, early Friday, April 9, 2021. Massachusetts won 3-2 and will face St. Cloud State in the championship game Saturday. (AP Photo/Keith Srakocic)

Minnesota Duluth coach Scott Alan Sandelin, left, greets Massachusetts coach Greg Carvel after an NCAA men's Frozen Four hockey semifinal in Pittsburgh, early Friday, April 9, 2021. Massachusetts won 3-2 and will face St. Cloud State in the championship game Saturday. (AP Photo/Keith Srakocic)

Minnesota Duluth goaltender Zach Stejskal stops a shot by Massachusetts during the third period of an NCAA men's Frozen Four hockey semifinal in Pittsburgh, Thursday, April 8, 2021. (AP Photo/Keith Srakocic)