Mater Dei was caught looking ahead to its showdown with Bishop Gorman.
The Monarchs, ranked No. 1 nationally by MaxPreps and USA Today, committed seven turnovers and lost 43-36 to host Centennial on Friday night in Corona, California.
Gorman (4-0) hosts Mater Dei (2-1) at 7 p.m. Sept. 19. The Gaels, ranked No. 2 nationally by USA Today and No. 3 by MaxPreps, are winless in four meetings against their California rivals and lost 31-15 in 2024 .
No. 21 Centennial (3-1) led Mater Dei 28-0 after the first quarter and 33-7 at halftime before the Monarchs stormed back with 29 unanswered points in the third quarter to take a 36-33 lead.
Centennial tied the score on a field goal with 8:27 left in the fourth quarter then recovered a fumble on the first play of the next possession, Mater Dei’s si