Brewer fell to 3-19 with an 83-49 loss on the road at West Morgan Friday. The Patriots trailed 53-30 at halftime.
Austyn Holmes scored 10 points to lead Brewer, while Mahan and Hunter Lawrence each had eight points.
Carson Muse finished with 17 points to lead West Morgan. Dyllan Ward had 13 points, while Isaac Ward added 11 and Jordan Johnson had 10 in the victory.