Associate head coach Lorenzo Romar will coach in his place.
"We knew they'd come out with fire, and wanting to prove something", UO sophomore Keith Smith said.
"I thought Deandre was a complete and total man out there among boys", Arizona assistant coach Mark Phelps said on the team's postgame radio show.
Bilas also demanded Arizona put Miller on administrative leave and bench Ayton until the matter can be investigated fully.
The school did not specify why Miller didn't coach against OR or if he will sit out any other games.
Parker Jackson-Cartwright answered every question. "His shooting will continue to improve, and I think at that point, when all of that comes together, then you're going to have an elite National Basketball Association player". I don't think we've gone out and done anything without him being there, his presence, so it's tough.
OR (19-10, 9-7) used a stellar performance at the line and a balanced attack to pick up its second straight win. Elijah Brown scored 22 of his season-high 30 points after halftime.
Alkins had a chance to pull Arizona within two in overtime, but his technical foul after a dunk allowed the Ducks to keep a four-point edge before McIntosh connected from long range.
The quote of the year in the Pac-12 came from Colorado coach Tad Boyle, who was asked earlier this season if beating Arizona had added significance because of the Federal Bureau of Investigation bull's-eye on the Wildcats' program. Arizona was up 43-37 at the break. "Regardless of who is coaching, we have a job as players and that job is to come out and play extremely hard". I suspect Arizona won't be the only program starting from scratch after what could be a nuclear winter throughout college basketball.
For two years, the FBI investigated bribes in college basketball. It impacted UA's night greatly and when it was combined with 17 turnovers it was too much for the team to handle to end its road trip to the OR schools. Oregon's Payton Pritchard missed a driving bank shot with two seconds remaining, sending the game to overtime.
CBS Sports' request for comment from Arizona was not immediately returned. For over 10 minutes Ayton did not attempt a shot and didn't make the shot in the last 15:51, the impending result led to OR jumping to take control of the game and ultimately the win. A -13 turnover margin is a great way to lose a road conference game, especially against a talented team such as Oregon.
Richardson, who worked for Miller the previous 10 seasons at Xavier and Arizona, was one of four assistant coaches arrested by FBI agents on September 27 after a two-year investigation into bribes and other corruption in the sport.
Brown went from attempting four free throws over his past eight games to shooting 17 against the Wildcats.
Any added satisfaction for the Ducks in seeing the Pac-12's best team in such a wounded state?
Arizona now holds a half-game lead over USC (12-5) in the Pac-12 standings. Deandre Ayton is eligible and will play tonight.
The Oregon Ducks won the game 98-93 with five players in double figures.