Bridgewater led by 12 points, 60-48, with 10:05 left in the game, but the Eagles did not score again until the 4:30 mark as Olivet rallied to take a five-point lead.
The Eagles pulled to within one, 65-64, on two Josh Fox free throws, but Olivet hit 5-of-6 foul shots in the closing two minutes to hold on for the victory.
Dominic Trawick and Fox each scored 14 points to lead five Eagles in double figures. Andrew Cathlin and Michael Oblitey each scored 11 and Jay Strotman hit all five of his shots to finish with 10 points. Trawick grabbed 12 rebounds to record the first double-double of his career.
Brandon Way scored 19 points to lead the winners.