Colorado Mines outscored SDM 10-2 over a two-minute stretch to pull the Orediggers within 60-59 with 7:55 to play.
A long rebound caromed to Williams who quickly fed the ball ahead to Sueker, who was breaking down the floor wide open, leading to a dunk.
Damani Hayes then broke to the basket from the left wing for another dunk ahead of Fiddler's 3-pointers. With the lead at 72-64, Williams' cross-over dribble shed Kobi Betts, leaving the SDM guard with a step-back 3-pointer to make it 75-64.
"Every win matters at this point," said Williams, who finished with 26 points on 8 of 12 shooting. "We just have to get every win."
Fiddler finished with 19 points and Logan Elers scored 10 points for South Dakota Mines (8-8, 5-5 RMAC).
Betts led Colorado Mines with 16 points. Ben Boone finished with 13 points, Brendan Sullivan had 12 and Titus Reed 11 for the Orediggers (11-6, 7-3 RMAC).
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Gallery: (1/20/2020) Hardrocker MBB vs. Colo. School of Mines