CORVALLIS, Ore. | Kayla McBride scored 20 points, Natalie Achonwa added 16 points and eight rebounds, and No. 2 Notre Dame remained perfect with a 70-58 victory over Oregon State on Sunday.
Sophomore Jewell Loyd, last year's national freshman of the year, had 10 points for the Irish (11-0) — 8.5 below her team-leading average coming in.
Jamie Weisner scored 18 points to lead the Beavers (8-4), and Ruth Hamblin added 12 points, eight rebounds and a school record-tying nine blocks.
Notre Dame used an 11-0 run bridging halftime to take a 37-33 lead, and didn't trail again.
Oregon State didn't trail until Ali Gibson's 3-pointer with 13:06 left in the first half.
Hamblin's put-back had stretched the Beavers' lead to 33-26 with 55 seconds left in the opening half. The Irish scored the last five points of the period to pull within two at the break, and then scored the first six points of the second half.
Notre Dame began the day leading the nation in field-goal shooting (52.2 percent) and 3-point shooting (44.9 percent), but the Irish shot 36 percent overall in the first half and 1 from 6 on 3s.
With 1:25 left, however, Ariel Braker got a steal off an inbounds play for Oregon State, and McBride made a jumper to push the lead to 66-58. Braker blocked Weisner on the Beavers' next possession.
The Irish, who have reached the Final Four each of the last three years and title games in 2011 and 2012, are off to their best start since 2009-10, when they began 15-0.
Notre Dame's next game is Jan. 2 against South Dakota State.
Weisner, a sophomore guard, entered the contest as the Beavers top scorer at 14.9 points per game. OSU has a young team, with four underclassmen starters.
Sunday's game was the start of a tough stretch for the Beavers, who open Pac-12 play next week with games against No. 23 California and No. 4 Stanford.