OR is now averaging 79.1 points per game on offense while giving up 65.7 on defense.
The Rams flexed depth many teams seeded higher wish they could, with Stanford Robinson (six points per game) exploding off the bench for 21 points on 10-of-12 shooting.
OR advances to take on a red-hot shooting team in the form of seventh-seeded MI, which turned it on late and upset second-seeded Louisville on Sunday, 73-69. The way the matchup with Rhode Island started was turnover laden for the Ducks, but the team regrouped and found a small spark in the second half.
He was a nightmare for Rhode Island on the perimeter by going 4-for-5 from three.
Dorsey had 27 points, 17 of which came in the second half.
They kept up the pace, attacking the OR defense and leading by as much as 11 points with more than 13 minutes left in the game.
The Rams kept crashing the offensive glass to create extra chances.
The Rams went into halftime with a 46-38 lead, thanks to a strong shooting half. Dorsey was a force all night long, carrying his team with a barrage of jump shots, no bigger than the game victor he hit with 36 seconds left.
OR committed 14 turnovers and failed to secure key defensive rebounds playing again without injured big man Chris Boucher, who tore the ACL in his left knee during the Pac-12 Tournament semifinals.
Call it a total team effort, as the Rams shot 50.8 percent from the floor (30-of-59) compared to Oregon's 48.1 percent (25-of-52).
"That defense we faced is as good as any defense we faced all year", OR coach Dana Altman said. This game will take part in the Midwest Region and air on TBS from Golden 1 Center in Sacramento, California.
"We weren't getting him the ball enough for a period in the season, and that was my fault, " Altman said. But Dorsey is one of the tournament's hottest players and Brooks is one of its best players, giving OR a duo as capable of making big shots with the game on the line as anybody left in the bracket.
The Ducks needed every bit of it as they trailed by as many as 11 points in the second half.
"Unacceptable", the coach said.
Four players are averaging at least 9.4 points per game for Rhode Island, they are: E.C. Matthews (14.9), Hassan Martin (14.1), Jarred Terrell (12.5) and Kuran Iverson (9.4). "It's very hard to describe", he said. He finished with 27 points, five rebounds, three assists, and three steals.