E.J. Singler scored 19 points and No. 16 Oregon rallied from a 10-point halftime deficit to beat Washington State 68-61 on Wednesday night.
Singler scored 14 points in the second half for the Ducks (17-2, 6-0 Pac-12), who trailed 39-29 at halftime before pulling out their eighth straight victory.
The win was Oregon's 19th straight at home, tied for the sixth-longest active streak in the nation.
The Ducks are off to their best start in conference play since 1925-26 when they were called the Webfoots and played in the Pacific Coast Conference.
Arsalan Kazemi added 16 points for Oregon and Damyean Dotson had 10 points and nine rebounds.
Mike Ladd had 19 points and Brock Motum scored 14 for the Cougars (10-9, 1-5), who shot 27.3 percent in the second half as they lost their lead..
Oregon opened the second half on a 9-0 run, getting within a point of the Cougars' double-digit lead on a breakaway dunk by Carlos Emory that made it 39-38 at the 15:33 mark.
But Dexter Kernich-Drew snapped an 0-for-5 start from the field to the second half for Washington State with a tough layup and Motum followed with a three-point play to put the Cougars back up 44-38.
Singler scored 10 straight points, tying the game 46-46 with the second of his consecutive 3-pointers. His free throws at the 11:45 mark gave the Ducks their first lead of the game, 48-46.
The Cougars went back up 53-52 on a layup by Royce Woolridge with 7:38 to play, but Kazemi answered with a dunk off a pass from Singler, and Dominic Artis made a 3-pointer off another assist by Singler as the Ducks took a 57-53 lead. They led the rest of the way.
Ladd had 14 points, six rebounds and five assists in the first half for the Cougars, who were halfway to their first win against a ranked team since beating No. 18 Washington on Jan. 30, 2011.
But Washington State cooled off considerably in the second half. After making 7 of 13 3-point attempts in the first half, the Cougars missed on all 11 of their 3-point attempts after halftime.