Michael Rogers added 10 points for the Crusaders (9-4), who overcame a double-digit deficit in the second half and held off a late charge by the Golden Grizzlies (7-7).
After Valparaiso took a 103-96 lead with 18 seconds to play, Larry Wright hit consecutive 3s -- the second coming with 4 seconds remaining -- to make it a one-point game. Erik Buggs then missed two free throws for Valparaiso, but Ryan Broekhoff came up with the offensive rebound to seal the win.
Reggie Hamilton led the Grizzlies with 26 points, and Wright finished with 24.
Oakland led 52-45 at halftime and pushed its advantage to 10 early in the second half before Valparaiso rallied.