Pepperdine won all three of its games as a No. 3 seed and will next play TCU in the best-of-three super regionals.
Cal Poly, which was the top seed, held on to beat Sacramento State 6-5 earlier on Sunday, knocking the regional's No. 4 seed out.
Arizona State, the regional's No. 2 seed, was already eliminated with two losses.
2014: The Year in Music [PHOTOS]