Senior defensive lineman Zach Donahue said the loss left a bad taste and the Barbs will be "coming pretty hard" for the Lancers.
"Just cause you're up 21 doesn't mean the game is over," Donahue said. "Anybody can come back. Everybody has a fighting chance no matter what."
Defensive back Jordan Gandy said the team learned not to become complacent.
"You always have to finish." Gandy said. "Even if you are up you have to play to the end of the game. We'll definitely do that this year."
The Lancers opened with a 36-34 win against Waubonsie Valley, forcing a late turnover to cap a comeback from down 21-13 at halftime. Last week against WW South, the Lancers were down 14-0 late in the first half.
Now the Lancers have matched their win total from a year ago as they search for their first playoff berth since 2009, when they qualified for the Class 8A tournament.
The Barbs will try to limit the time the Lancers, and quarterback Jackson Behles, spend on the field. Behles was 12 for 20 for 83 yards in the first half against DeKalb last year, but finished the game 21 for 36 for 339 yards and three touchdown passes.
"I'm very impressed with our defense, but at the same time I'm impressed with what Lake Park does on offense," Weckler said. "It's going to be a great test. Our guys definitely have to play up to their potential, if not above their potential."