"We didn't talk about knocking Long Island out (of the playoffs)," Baltimore coach Tom Marechek said. "We just wanted to keep our momentum going."
Earlier, Baltimore built a 10-2 halftime lead against New England (2-1) after starting strong in the opening period.
"We were hustling after groundballs," said Stanwick, who scored all three of his goals before the intermission. "We put in a lot of effort."
Stanwick added that beating Long Island would be a great way to conclude the second day of competition.
"We definitely want to do that," he said. "This is all about the team. We want to win it."
He and McBride helped Baltimore turn a 7-2 advantage into a bigger margin near the end of the first half.
McBride scored back-to-back goals after long runs through the New England defense before Stanwick darted inside for another goal on an extra-man situation.
On Friday, after exploding for six goals to snap an 8-8 halftime tie, Baltimore had to hold on to secure an 18-16 shootout win over the Midwest.
Valis and Wynne each notched their game-high fifth goals in the final minutes of the contest to stifle a withering Midwest rally.
The Baltimoreans came out with a vengeance in the third quarter on goals by Valis, Wynne, Stanwick, Conrad, Ashwood and Wynne again to take what appeared to be a commanding 14-8 advantage midway through the period.
However, a goal by longstick middie Jake Miller, a rising senior from Arrowhead High in Wisconsin, ignited a 7-2 run that closed the gap to 16-15 with about four minutes remaining.
That's when Valis dodged past the opposing faceoff specialist and one-hopped a shot into the net before Midwest rising senior Pierre Byrne, from Indiana's Culver Military Academy, ripped a shot with one second left in an extra-man situation to make it, 17-16.
The Baltimoreans put it away with about 45 seconds left when Wynne's ride-and-strip preceded his back-handed flip shot into the goal for the final margin.
Defense was not a strong suit for either team in the opener.
"We gave up a lot of uncontested shots," Marechek said. "We needed to tighten up the middle. Our goalies (Barretto and Gipe combined for seven saves) let in some shots they shouldn't have, and they know that. That's just too many goals."