The win also keeps the alive the slight glimmer of an at-large NCAA tournament berth, as it acts at their 17th win of the season.
Oregon used a 10-0 run to open the second half to turn a three-point halftime deficit into the game's largest lead.
"Mike started off with his and-one and we just went from there," Dotson said.
"We wanted to get some energy going… We didn't play with the energy and bounce in the first half," coach Dana Altman added.
Once again, the Ducks struggled to maintain the lead, allowing Washington to tie it at 60 a piece at the nine minute mark of the half. But UW never led and Oregon was able to hold on for the important victory.
"I think we just focused on that in practice. We came out here we knew that at the end of the game we had to get stops and rebounds, and [if we did] we'd come out with the win," Dotson said.
Dotson led the Ducks in scoring before leaving the game with a pinky injury in the closing minutes. Dotson said after the game that he was fine.
Prior to the minor setback, Dotson made 7-of-8 field goals for 17 points. The total tied his season-high.
"I've just been working on those shots a lot. So, getting in the gym before the game and on off days. I felt like it was going to come one of these days," he said.
Dotson's biggest impact might have come at the other end of the court where he marked the Pac-12 third leading scorer C.J. Wilcox.
Wilcox had 23 points in the first meeting, including a game-clinching three in the final minute. But, Wednesday was held to just nine points on 2-for-8 shooting.
"I thought Dot and Jason did a nice job on Wilcox. He's an all-conference player and one of the best in the league and really hurt us up their place," Altman said.
Washington cut the lead to three with 2:34 remaining, but Moser finished a three-point play to make it six and Washington never got closer.
"We actually messed up the play, so I broke it off and did my own thing… It worked out pretty good," he said.
Moser finished with a game-high 20 points.
Joseph Young had 18.
Oregon opened the season with 13 straight wins prior to losing five straight. The Ducks will have the opportunity to extend its two-game win streak Sunday against Washington State.
"The guys have stayed resilient, they've stayed together. The seniors have tried to lead. It's really important for those guys to finish strong. I like the way they've handled it. It was a tough stretch," Altman said.