The duo combined to make 16 of the Leathernecks' (4-7) 31 field goals.
Western Illinois led 39-38 at halftime. A 13-4 run after intermission extended the lead to 52-42 before South Dakota (9-6) began climbing back. Stanley Umude made 1 of 2 foul shots with 8:58 left to tie it at 66-all. The Leathernecks responded with an 8-0 run and the Coyotes never got within four points down the stretch.
Umude led the Coyotes with 27 points and Tyler Hagedorn scored 17.
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