MANSFIELD — No. 2 Bishop Feehan had a good idea that adversity would hit at some point in Friday’s Division 2 state semifinal against third-seeded Bridgewater-Raynham.

And when it did, the Shamrocks didn’t flinch.

Bishop Feehan overcame a 13-point second-half deficit to claim a dramatic 31-27 victory over the Trojans at Mansfield High’s Alumni Field to advance to the Super Bowl at Gillette Stadium for the first time since 2012, where the Shamrocks (9-1) will face top-seeded Catholic Memorial.

“I said to the kids before the game, ‘We’re going to hit adversity and we’re going to spit right in its face,’ ” Feehan head coach Bryan Pinabell said. “That’s exactly what we did. Our kids weren’t going to be denied. They just keep fighting, it ain’t pretty. We’re not getting style points but we just keep fighting.”

Feehan struggled to contain B-R’s dynamic quarterback-wide receiver combo in Jack Lambert (26-for-41, 255 yards, four TDs) and Dylan Reed (14 catches, 90 yards) as the two connected on their third touchdown when Lambert hit Reed from 8 yards out for a 27-14 lead just 3:11 into the third quarter.

Bridgewater-Raynham’s Jack Lambert looks to make a pass during a Division 2 semifinal game at Mansfield High School. Bishop Feehan won, 31-27. (Libby O’Neill/Boston Herald)

But Feehan, which faced numerous deficits this season, remained unfazed. Feehan put together a 12-play, 82-yard scoring drive to cut into the deficit with 3:34 left in the third quarter as Xavier Baker, who had three key receptions on the series, capped the possession off with a 4-yard touchdown run.

The Shamrocks then utilized a short field on their next drive to take the lead. After three straight strong runs from Andrew Orphanos, senior quarterback Owen Mordas (9-for-17, 136 yards, 2 TDs) rolled to his right and tossed up a pass for Max Pennellatore, who came down with the 22-yard touchdown reception while being blanketed by a B-R defender. Gavin Mooney’s extra point gave Feehan a 28-27 lead with 8:10 left.

“I trust Max. We work that stuff in practice every week,” Mordas said. “We just have that connection. We’ve been having it the past four years, and it paid off.”

Feehan’s defense rose to the occasion as well in the fourth quarter by forcing B-R into two turnovers on downs — the first of which led to Pennellatore’s decisive score — and then came up with a massive defensive stand in the final seconds to halt the Trojans and send the Shamrocks into a celebration.

“I think our kids realized their backs are against the wall,” Pinabell said. “It was do or die. We made plays. That’s what you got to do in big football games.”