The junior point guard shot 1-for-16 from the field against the Kangaroos and 1-for-11 beyond the arc, matching a season-low with six points.
Jarell Flora (19 points, 5 threes) and Emmanuel Chibuogwu (12 points, 2 threes) almost covered for Umipig's off night, but SU was unable to hold a slim halftime lead and lost for the fourth time in five games.
The 'Roos responded with a 7-0 run to regain the lead, and then Flora hit a three to highlight SU's subsequent run that put them back on top, but UMKC would take the lead for good with another 7-0 run capped by a Frank Williams three with just under 13 minutes remaining in the game. The Redhawks would get to within two, but UMKC made its free throws down the stretch and pulled away for the win.
"We did a good job in the first half, but wasn't able to sustain it," SU coach Cameron Dollar said afterward. "I credit them (UMKC) for continuing to pressure and compete. In the second half, we had our chances, but we were not able to capitalize."
The loss dropped Seattle U (13-15 overall, 5-10 in the WAC) into a three-way tie for last-place in the conference with Cal State Bakersfield and Texas Pan-American. The Redhawks -- who close out the regular season on Saturday at Chicago State -- are now assured a lower-half seed in the eight-team WAC tournament, which begins March 13 in Las Vegas.