GRAFTON, N.D. -- Paul Novak scored 1 minute, 38 seconds into overtime to finish off a comeback victory for Grafton-Park River.
Ryan Callahan scored an unassisted goal late in the third to tie it.
"We came out with the start we wanted and the lead we wanted," Central coach Tony Bina said. "But Grafton finished strong and capitalized on some opportunities."
Central and Grafton-Park River tied 4-4 earlier this season in Grand Forks.
Senior defenseman Jeremy O'Keefe led the Knights with two goals.
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Spoilers goalie Zach Suda made 27 saves, while Central goalie Eric Melland stopped 20 shots