DORCHESTER — A six-inning effort from starting pitcher Michael St. Martin and timely hitting helped propel No. 4 Walpole to a 10-2 victory over No. 1 Plymouth North at UMass Boston’s Monan Park to secure a spot in the MIAA Division 2 baseball championship game.

The Timberwolves scored all 10 runs in the final four innings and took advantage of six Eagle errors to claim the victory. This avenged a loss to Plymouth North in the last year’s Division 2 championship game, which head coach Chris Costello said that loss lingered in their heads all season.

“The entire season was based on getting back to that game,” Costello said. “It speaks volumes to their maturity and ability to stick to what we called the ‘long play.’ That was our mantra and what we spoke about regularly, that getting back to that game was the ‘long play.’”

The Timberwolves only struck out three times in the game, which Costelllo said came from a mentality that focuses on putting the ball in play as much as possible.

“You have to put the pressure on the other team,” Costello said. “The other team has to get 21 outs, so if the other guy gets 10 strikeouts, then they only need to make 11 plays. If you can cut that down, it’s a lot harder for a high school team to make 19, 20 plays.”

Neither team scored in the opening inning but Plymouth North threatened with a Will Novak double. The Eagles eventually put two unearned runs on the board in the second inning and looked poised to add on. However, St. Martin did not lose faith in his teammates and knew they would get the job done.

“I always trust myself when I am out there,” St. Martin said. “I know my guys will make a play; all my job is to throw strikes. That’s what I did and shoutout to my defense because they locked in and made the plays.”

The Timberwolves scored two runs in the fourth inning via a single from Richie Hayes and eventually a wild pitch that plated him a few batters later.

But the Eagles looked poised to add on in the bottom of the inning when they loaded the bases. Despite the adversity, St. Martin reared back and struck the batter out.

“It was a huge moment,” St. Martin said. “We had the momentum and I had to keep the energy going.”

The fifth was where the Timberwolves turned it on. Cole Pileski knocked a hard-hit ground ball that was ruled an error, but gave Walpole a 4-2 lead.

“Just hit the ball somewhere as hard as I can and do damage,” Pileski said of his approach.

A few more miscues led to three additional Walpole runs and they ended the inning leading 7-2. The Timberwolves added three more via some additional errors and wild pitches in the final two innings before Landon Lipsett shut the door in the seventh.

Walpole will now seed a state championship and will take on either Reading or Somerset-Berkley for that honor. Regardless of the opponent, Costello said his team will be ready to play their game.

“We’ll just go play a baseball game,” Costello said. “The opponent doesn’t really matter at this point, if we play the way we are capable of, we’ll be in the late innings and have a chance to win. There’s two great baseball teams we could play and either way it’s going to be a heck of a game.”