Pitching once again failed the Trojans with Freshman Robert Stock giving up the game winning homer in the 11th inning.
Cardinal center fielder Sean Ratliff went 3-for-5 with four RBI while Cord Phelps went 3-for-6. Nolan Gallagher (5-6) earned the win for Stanford (26-28, 7-15) with four scoreless innings of relief, allowing two hits with two walks and five strikeouts.
Freshman Robert Stock (2-2) took the loss for USC (27-27, 8-14) by matching his longest stint of the season with 5 1/3 innings, allowing six runs (five earned) on nine hits with two walks and five strikeouts. Stock had induced a possible double play to end the 11th, but the Trojans were unable to get the third out and Seawell followed by hitting the game-winner on a 1-1 pitch over the fence in left.
The Trojans took the lead early in the fourth with three runs after loading the bases on singles by J.J. Owen, Lucas Duda and Hector Estrella. Trojan catcher Johnny Bowden drew the bases-loaded walk for the first run and right fielder Roberto Lopez hit a two-run single to right for the early lead.
Estrella had three hits for the Trojans while Lopez matched a personal-best with three RBI on the evening.
That pretty much ends SC's bid to get to Omaha for the College World Series as they needed a sweep just to be considered a longshot.
The series continues today at 1:30 at Dedeaux Field.