OMAHA, Neb. -- Bryce Fehmel limited LSU to two hits in eight innings, KJ Harrison hit the first College World Series grand slam at TD Ameritrade Park, and Oregon State beat LSU 13-1 for its 23rd straight win Monday night.

The top-seeded Beavers (56-4), who matched the school-record win streak they set earlier this season, took control of Bracket 1. They don't play again until Friday, and need one more win to advance to next week's best-of-three finals.

LSU (49-18) had its 17-game win streak end with its most lopsided CWS loss since a 20-6 throttling by Cal State Fullerton in 1994. The Tigers face elimination when they play Florida State on Wednesday.

Photos: Beavers beat LSU at CWS

“This is our time. This is what we came here for,” said Beavers coach Pat Casey.

Fehmel was lights out yet again in the postseason after a dominant performance against Vanderbilt in the Super Regionals.

“Once we get in between the lines, it's just baseball,” said Fehmel when asked about pitching on such a big stage.

Harrison said he was “blessed” to accomplish something as big as the first grand slam in TD Ameritrade Park history.

“That's what you dream about as a little kid,” he said.

When asked about how much the batters feed off of the pitcher’s success, Oregon State outfielder Trevor Larnach, who was 2-3 with 3 RBI’s and one run scored, said, “They trust us. We trust them. We all do our jobs. When we are rolling, we have games like this, and it is a lot of fun.”

The Beavers will look to continue their run Friday when they take on the winner of the Florida State/LSU consolation game.