Oregon State climbed one spot to No. 3 and Oregon fell one spot to No. 16 in this week's Baseball America Top 25.
The Beavers went 3-0 last week, sweeping Texas State. They host San Francisco in a two-game series today and Wednesday before opening Pac-12 Conference play at Arizona in a three-game series that starts Friday.
The Ducks went 3-2 last week, taking two against Cal State Northridge before losing two of three against No. 2 Vanderbilt. They host Texas State in a two-game series today and Wednesday before opening Pac-12 play at USC in a three-game series that starts Friday.
North Carolina remained the nation's top-ranked team.
Other ranked Pac-12 teams include No. 11 UCLA, No. 14 Arizona State and No. 20 Arizona.