In last season's meeting, St. Francis won in the final minute to earn a 32-25 win at Chaminade.
"Every time we've plated them since I've been here, with the exception of one or two games, it's been extremely close," said St. Francis Coach Jim Bonds, whose team scored 23 unanswered points to take a 26-22 lead in the third quarter. "They have some good athletes, and we just couldn't rally it up in the last [55 seconds].
"It's tough losing four games in a row and having two league losses, but I think we have the people who can fight their way out of it. You just have to tip your hat to Chaminade."
St. Francis fell to 3-4, 0-2 in league. Both league loss have come against Gardena Serra and Chaminade, which are ranked Nos. 1 and 2, respectively, in the CIF Southern Section Western Division.
The Eagles (7-0, 2-0) began their winning drive at their own 27-yard line with 3:07 remaining. Quarterback Logan Scott completed a pair of long passes, including a 25-yard strike to wide receiver Will Noonan that got the ball inside the St. Francis 20 with 1:20 left. Two plays later, Newby ran to the left to put the finishing touches on the victory.
St. Francis had one last opportunity, but it turned the ball over on downs at its own 39-yard line with 16.6 seconds remaining.
"We were trying to get the game into overtime and have Ian Sternau kick a field goal," Bonds said.
Chaminade, which topped St. Francis for the fifth time in the last six meetings, took an 8-0 lead on a three-yard run and a two-point conversion by running back Devon Lee to make it 8-0 with 6:06 remaining in the first quarter. The Eagles then scored on their next possession when Lee broke free on a five-yard run to extend the lead to 15-0 with 48.4 seconds left in the opening frame.