Sam Kidder’s two-out, two-run triple broke a tie in the bottom of the fourth inning and fifth-ranked Falmouth went on to defeat No. 12 Biddeford, 5-3, in a Class A South Round of 16 contest Monday afternoon.

Kidder struck out his first two at-bats against Tigers starter Brady Ham, but he broke a 3-3 tie with a deep drive to centerfield, which scored Sean Dilworth and Ethan Hendry.

Falmouth (14-3) went up, 3-0, in the bottom of the second, as Patrick Gill tripled and scored on a wild pitch, a second run scored on an error and with runners on the corners, Peter McCluskey stole home on an attempted pick-off throw to first.

Biddeford (7-10) rallied against Falmouth starter Bennett Smith in the third, as Ashton Crowell hit an RBI single and another run scored on a ground ball.

The Tigers tied it in the top of the fourth, on another run-scoring ground ball, but Kidder answered in the bottom half.

Brennan Rumpf came on in the seventh to set the Tigers down in order and earn the save.

Falmouth will play either No. 4 Marshwood or No. 13 Berwick Academy in Thursday’s quarterfinal round.