“We knew we were better than our record, we knew we were playing against a great team, and we knew what we’re capable of,’’ Barnstable coach Chris Whidden said.

Barnstable will play sixth-ranked Lincoln-Sudbury in the Division 1A South semifinals Nov. 29.

The two-time defending champion Trojans (6-2) suffered a setback in the second quarter when senior captain Nick Schlatz, who rushed for a 73-yard touchdown 18 seconds into the game, left with symptoms of a concussion. He ran for 129 yards in last year’s OCL title match, which B-R won, 50-22.

“When we were down 7-0, that deflated us a little bit, but there was no quitting,’’ said Whidden, who is in his first year. “We’ve been down before, we’ve been down almost every game this year, really. [We] just kept playing.”

Barnstable answered with three minutes left in the first quarter. Theo France (170 all-purpose yards) went up the middle from the 3-yard line to cap an 8-play, 52-yard drive. Tom Mullen’s kick failed and the Red Raiders trailed, 7-6.

Both teams scored in the second. B-R’s Brad DeIuliss connected with Eric Wabrek from 2 yards for the Trojans only completion of the first half, but a conversion pass failed.

The Red Raiders tied it a minute later when France went 49 yards through a host of defenders for a TD. Mullen’s kick was good, making it 13-all at halftime.

Nick Peabody, who rotated at QB with Murphy, found Tedaro France in the left corner of the end zone on the first drive of the second half. Mullen added another PAT.

B-R’s Branden Morin (106 all-purpose yards), who took over for Schlatz, scored from the 5-yard line with 2:15 left in the fourth. Kevin Wadsworth’s PAT tied it up.

Barnstable made it to the Trojans’ 37 on the ensuing drive, where Mullen attempted a 51-yard field goal that was inches short with six seconds left in regulation.

Barnstable stuffed B-R in the first OT, and Murphy faked to France on back-to-back plays, carrying it for 4 yards on second down and the final 5 yards on third down to set off the celebration.