Wiggins was 8 of 15 from the floor, leading Portland State (6-4) to a 58 percent shooting night. The Vikings were 9 of 21 from beyond the arc. Tim Douglas made four 3-pointers and had 16 points, Gary Winston had 13 and Sebastian Suarez added 11 points.
Jordan Spady paced Walla Walla with 22 points while Ethan Osias had 12 and Luke Spady added 10 points and seven rebounds.
Walla Walla jumped out 4-0 but that was quickly erased and they never led again. A 16-4 run by Portland State helped them to a 46-29 lead at the break.
The lead grew to 30 midway through the second half on a Wiggins layup and free throw, which was part of a 20-0 run.