BOSTON

Boston University forward Jordan Greenway barreled into the net and knocked Boston College goalie Thatcher Demko to the ice, where he remained long enough to scare his coach into checking on him.

When trainer Bert Lenz got to the crease, Demko quickly sent him away.

Demko turned away the trainer and 30 BU shots on Monday night for his school-record ninth shutout of the season, and Alex Tuch scored 1:57 into overtime to give the Eagles their 20th Beanpot championship in the first 1-0 game in the tournament’s 64-year history.

A year after losing in the opening round to end a five-year winning streak in the annual tournament that determines Boston’s college hockey bragging rights, BC (20-5-4) beat its Green Line rival to return the trophy to Chestnut Hill.

Sean Maguire made 41 saves for the Terriers (16-8-4) and was named the tournament’s most outstanding player. But he was beaten in overtime when Tuch took the puck in the middle of the ice near the blue line and wristed the game-winner past the screened goalie.

The tournament pits the area’s four college hockey powers against each other on the first two Mondays in February, and it’s been dominated by the two schools just about 2 miles apart on Commonwealth Avenue. BU and BC have met in the final 22 times in the event’s history dating to 1952; the Terriers lead 12-10, but BC is closing the gap.

The Eagles won five straight before BU ended the streak last year behind Jack Eichel, the Hobey Baker Award winner who went on to become the No. 2 overall NHL draft pick by the Buffalo Sabres. BU went on to play for the NCAA title — in the same building where its Beanpot banner hung.

This year, it’s Boston College — the No. 4 team in the nation — that is hoping to follow a Beanpot title with an NCAA championship.