BOSTON — Much of the focus for the BC High boys hockey team heading into the state tournament was finding consistency in the sporadic high-level play it used throughout an up-and-down regular season.

With five different scorers and a dominant three periods in Thursday night’s 5-0 Div. 1 first round win over 19th-seeded Andover, the No. 14 Eagles (10-10-1) are off to an excellent start.

BC High has outscored its last three opponents 10-0, and will need to carry that momentum into a second-round date with Catholic Conference rival No. 3 Catholic Memorial on Saturday at 7 p.m.

Andover’s season ends at 11-9-1.

“It gives you all the confidence you need to continue moving forward,” said Eagles head coach John Flaherty. “At this stage of the season, you just got to do whatever it takes to move on. You got to take one game at a time and you got to prepare for that team you’re playing, and execute. Our guys did it today, they executed to perfection from the goalie all the way out.”

A physical opening period was light with scoring, though senior Owen Welch (goal assist) put BC High on the board in the final four minutes of the frame by jamming home a rebound for a 1-0 lead.

Andover generated a couple quality looks on Eagles freshman goalie Drew Karlovits (nine-save shutout), but struggled to maintain possession through the neutral zone for much of the game. A 9-3 shot advantage for BC High in the first period turned into a 16-2 disparity in the second and 13-4 in the third, just about controlling all three frames to prevent any sort of comeback.

“Everyone contributed,” Flaherty said. “I’m most proud of the consistency of the effort. … We had a consistent, 45-minute game today, which is probably our best of the year.”

“We carried (this) a little bit from our senior night game,” Welch added. “Three straight games, no goals, it’s not one line or one person. It’s just the whole team, we’re all playing together.”

Golden Warriors goalie Vinny D’Urso withstood a healthy portion of shots to keep it a one-score game in the second, up until the midway point. Sonny Christian blocked a shot from the point and it floated into open ice, which he scooped for a breakaway and potted for a 2-0 lead.

Welch’s line cooked up another goal early in the third, seemingly deflating Andover with a 3-0 lead on a back-door feed to David Williams. Tripp Schuhwerk scored with 7:35 for a 4-0 dagger, but Brendan McCarthy’s one-timer four minutes later added one more for good measure.

Controlling play in the tournament’s opening round was a big confidence booster, but so was having all five goals come from different players.

“We’ve got depth,” Welch said. “Whoever’s on the ice, we trust them all.”

Another chapter in the historic rivalry between Catholic Memorial and BC High now awaits. The Eagles won the latest playoff matchup in 2022 as the 13th seed, upsetting the No. 4 Knights in the second round.

“It’s CM-BC High, it doesn’t need to be said anymore than that,” Flaherty said. “It’s exciting for high school hockey, it’s exciting for both communities.”

BC High’s David Williams redirects a shot on Andover’s Vinny D’Urso during BC High’s 5-0 state tournament victory Thursday. (Staff Photo/Stuart Cahill/Boston Herald)