NHL roundup: Mammoth stun Penguins in OT after last-second goal

Logan Cooley scored with one second left in regulation and then Mikhail Sergachev added a goal 3:27 into overtime as the visiting Utah Mammoth stunned the Pittsburgh Penguins 4-3 on Thursday. Cooley completed his fourth career hat trick after Vincent Trocheck fired from above the right circle, producing a rebound that Cooley finished from the left doorstep. In overtime, Sergachev converted from deep in the right circle after Barrett Hayton was initially stopped on a 3-on-1 rush. Utah’s Andrew Peeke recorded an assist in his 400th NHL game, and Sebastian Cossa made 31 saves. Elsewhere, Buffalo beat Anaheim 7-6 and Los Angeles edged Ottawa 6-5 in OT.