EUGENE, Ore. -- Joseph Young scored 25 points as Oregon took a commanding lead early and held off archrival Oregon State for a 93-83 win on Sunday.
Mike Moser added 15 points and grabbed seven rebounds for Oregon (16-8, 4-8 Pac-12), which had five players in double figures.
The Ducks started the game shooting a blistering 12 of 16 from the floor and led 31-12 after a Jason Calliste 3-pointer at the 10:39 mark. Oregon went 7-7 on 3-pointers during the stretch, with Moser making three.
Oregon State responded with a 15-3 run, making the score 34-27 after a Nelson breakaway lay-in with 5:13 left in the half.
The Ducks pulled away and took a 45-35 advantage into the break.
In the second half, the Beavers twice trimmed the lead to two points, the latter when Hallice Cooke sank two free throws to make the score 72-70 with 5:11 remaining.
Missed shots and offensive fouls on two straight possessions doomed any hope of a comeback for the Beavers, and the Ducks went on a 9-0 run capped by another Calliste 3-pointer with 2:51 left.
Oregon made 12 of 14 free throws in the final two minutes to seal the game.
The Ducks were 11 of 21 on 3-pointers. Ironically, long-range shooting has been a strength for the Beavers this season.
Oregon State entered the game ranked first in the Pac-12 and fifth in the nation for 3-point shooting at 41.4 percent. That figure would be a school record if it holds for the rest of the year.
The Beavers hit 5 of 16 from beyond the arc on Sunday.
No college basketball teams have played more against each other than the Ducks and Beavers, who met for the 341st Civil War on Sunday. Oregon State leads the series 185-156.
Young, Oregon's leading scorer, had just five points in the Ducks 80-72 loss to the Beavers on Jan. 19. Oregon State held Oregon to 38 percent shooting in that game.
On Sunday, the Ducks shot 53 percent from the floor, compared to nearly 52 percent for the Beavers.
The Ducks started the season 13-0 before losing five of their first six games in conference play. The Ducks had dropped three of their previous four games, and all of the losses came by two points.
With the win, Oregon starting point guard Johnathan Loyd is tied for the most victories ever in a Duck uniform with 89. Former teammate E.J. Singler shares the record.
Loyd had 11 points and five assists on Sunday.
Nelson entered the game leading the Beavers and the Pac-12 with 21.5 points per game.
The Beavers were looking for just their second season sweep over the Ducks since 1993. The last was in 2010.