EUGENE -- Oregon softball concluded its opening weekend of the fall with its third straight shutout.

Shannon Rhodes, April Utecht and Allee Bunker each drove in three runs and Megan Kleist, Maggie Balint and Miranda Elish combined for 22 strikeouts and no walks in a 18-0, three-hit shutout of Concordia-Portland in 10 innings at Jane Sanders Stadium on Sunday.

Kleist, Balind and Elish combined to throw just 133 pitches over the 10 frames and struck out every Cavaliers batter at least once.

"I thought they all did a good job," Oregon coach Melyssa Lombardi said. "I thought they came in, were efficient, constantly working ahead and really doing a good job of using their pressure pitches, using their pitches out of the zone, to get the athletes to swing."

The Ducks got on the board quickly as Alexis Mack singled, Haley Cruse drove her in with an RBI double and Rhodes followed with an RBI single as part of a four-run first.

"Right now, I'm working on seeing the ball," said Rhodes, who drove in another run via a fielder's choice in a two-run second inning. "After a long summer you don't really see much live pitching, just mostly front toss, hitting off the tee, a lot of standstill. I focus on staying on my legs, seeing the ball as deep as I can and firing my body through it. Not much behind it, just keep it in the field and hit it hard."

Kleist struck out seven and allowed two hits over the first three innings, but the senior All-American was not satisfied with her first outing of the fall.

"There's definitely stuff I can work on this week to be better for next week," Kleist said. "It's the first weekend so, can only go up from here."

Mack (4-5) and Rhodes each had RBI singles to make it 8-0 after four.

Balint, who had a five-inning perfect game against College of the Siskyious on Saturday, struck out five of six batters in a perfect fourth and fifth.

Even with the offensive barrage, Oregon stranded eight runners, including leaving the bases loaded in the sixth, one of five blank frames on the day.

"If we have runners in scoring position, we got them in position, now let's drive them in and do a better job of that," Lombardi said. "Not leaving runners on base. We left too many runners on base today."

Utecht added a two-run home run in the seventh and the Ducks erupted for eight runs in the eighth via a bases-clearing double by Allee Bunker, RBI and single by Utecht, RBI groundout from Mack, two-run double by Rachel Cid and RBI double by Lexi Wagner.

Elish struck out six over three innings and Balint returned to strike out four more batters in the ninth and tenth.

The Ducks continue fall ball against Corban on Oct. 14 at 2 p.m.

-- James Crepea | jcrepea@oregonian.com | @JamesCrepea