"We had a couple of chances, but we had no timely hitting," said Esquival, whose team fell to 6-5 and 2-2 in league. "We made some defensive mistakes that led to some runs and Crespi hit the ball well.
"We just couldn't get it done. We had a chance to go 3-1 [in league] and separate ourselves. We had a chance to put ourselves in good position, but we didn't come out ready to play. I don't have a reason."
St. Francis took a 1-0 lead in the second inning on a run-scoring single by Pepperdine University-bound David Hubinger.
Crespi (6-7, 1-5) then scored twice in the third against St. Francis starting pitcher Ryan Garcia (2-1). Garcia went three innings.
The Celts scored once in the fourth to make it 3-1 before pushing across three runs in the fifth to extend their advantage to 6-1. Crespi scored twice in the sixth to close out the scoring and end St. Francis' two-game winning streak.
The Golden Knights will meet host Serrano in a Chino Tournament game at 2 p.m. today before facing first-place Chaminade, ranked No. 3 in the latest CIF Southern Section Division II poll.
St. Francis and Chaminade will meet at 3:30 p.m. Tuesday at Jackie Robinson Field.
"Those are going to be tough games," Esquival said. "I think we are OK on Tuesday with [Joey] Malham pitching for us, but we definitely need the same approach on Fridays from the other pitchers."