Northwestern held off Wilson 27-20 on Saturday, while Pius X lost its third straight game to start the season.
Northwestern improved to 2-1 in the Colonial League by beating the Warriors at Smith Field.
The Tigers built a double-digit lead, then had to mount two goal-line stands late in the game to hold on for the win. Wilson drops to 1-2.
Pius X lost to Steelton-Highspire 14-0 at Alumni Field. The Royals drop to 0-3 on the season.