St. Stephen’s/St. Agnes forward Graham Guidry is embattled in a competition with his father, Peter, who occasionally takes friendly jabs at his son about scoring 29 goals his senior year at Bishop Ireton in the early 1980s.

“Me and my dad, we have a little competition going,” Guidry said, “so I’m hoping I can maybe beat him so . . . I’ll have something to rub in his face, a little bit.”

After a sensational showing Tuesday against Landon, Guidry is nearly halfway to his father’s goal total, although that was far from his mind against the fifth-ranked Bears. Guidry was just thankful he had an opportunity to take down the Saints’ fierce rival on its home turf, scoring the game-winning goal in overtime to lift his team to a 2-1 victory in a key IAC showdown in Bethesda.

Guidry scored both goals for eighth-ranked St. Stephen’s/St. Agnes (8-1-2, 3-1), and now has 14 goals with eight games remaining in the regular season. After giving the Saints a 1-0 lead midway through the first half, Guidry went quiet for long stretches of the second half while Landon (6-2, 2-2) made aggressive runs at the net — which included a breakaway goal from Bears star forward Zach Fingerhut 10 minutes into the second half that tied the game.

Landon was stingy in the first five-minute overtime period, making pushes to the Saints’ net while the Bears’ student section provided a boisterous backdrop. After the period ended, the game officials called for the teams to switch ends and the Landon faithful began running around the field to get a better view of the Landon offensive end, hoping to see a game-winning goal by the Bears. But Guidry spoiled it, scoring before the fans reached the other end of the field. In the first minute of the overtime period, he took a header from Connor Padgett and got a step ahead of the Landon defense down the left side before dropping in the goal from about 15 yards out.

“He’s scored 14, and if he gets to 25, he [will have] 50 in his four-year career . . . it woud be really impressive,” Saints Coach Bo Amato said. “It’s great. We’re 3-1 [in the IAC] now. I would’ve been happy with a draw, to be honest with you.”

Guidry’s game-winner was eerily similar to Fingerhut’s goal just an hour before, one that brought Guidry immediate satisfaction in both a friendly rivalry against his father — and a not-so friendly rivalry against the Bears.