Oregon trailed the Tigers 36-29 at the half, but used a 56-26 second period to improve to 5-0. Oregon has outscored teams 267-to-187 this season.
The Tigers outshot, out-rebounded and were simply better in the first period, but in the second, the Ducks were efficiently offensively and clamped down defensively.
"Defensively we just weren't very good that first half," Oregon coach Dana Altman said. "For the most part the defense initiated our offense and once we got some shots in our energy level went way up."
Oregon jumped all over the Tigers in the second, scoring the first 20 points of the half to jump to a 49-36 lead. During that stretch, the Ducks made seven-of-eight to open the half, while the Tigers missed their first seven attempts.
"We stood around a little in the first half," Altman said. "Our ball movement needs to get better. We did take some bad shots that first half."
Joseph Young and Mike Moser had 14 of the the 20 on the run. Young scored seven on one possession, making a basket, drawing an intentional foul, before knocking in his second three of the game on the subsequent earned possession.
Senior point guard Johnathan Loyd had a career-best 13 assists.
"Johnny moves the ball, tries to make plays for guys. He's an energy giver and we've got to have more of those guys," Altman said.
Moser finished with a game-high 19 points.