LOS ANGELES — TCU won the rubber match of a three-game series with Southern California, as four TCU pitchers blanked the Trojans on four hits in a 3-0 Horned Frogs victory Saturday afternoon.The Horned Frogs (23-24) won the series opener 5-4 on Thursday but lost 9-3 on Friday when USC (17-29) erupted for an eight-run sixth inning, erasing an early 2-0 Frogs lead.On Saturday, Andrew Mitchell (1-1) worked his way around two hits and five walks in five innings for the victory.Trevor Seidenberger struck out two and walked two in his 1 1/3 innings. Riley Ferrell gave up two hits and struck out two in two-thirds of an inning. Alex Young picked up his fifth save of the season with two scoreless innings.Jantzen Witte broke a scoreless tie with a two-run triple in the top of the fifth. Cody Jones singled to start the rally with one out and moved to second on a walk to Paul Hendrix with two outs.A hit batter to lead off the sixth led to TCU’s third run. Pinch runner Davy Wright was safe at second on a potential double play ball after the throw from third pulled the second baseman off the bag. Another hit batter and a walk loaded the bases with two outs. Boomer White’s third hit of the afternoon drove in Wright.USC brought the tying run to the plate in each of the seventh and eight innings, but each time the Horned Frogs were able to turn an inning-ending double play.In the seventh, second baseman Hendrix hauled in a line drive and doubled off a runner at second to end the frame.The Horned Frogs will take the week off for finals and return to the diamond Friday for a key three-game road series at West Virginia. First pitch Friday is set for 5 p.m.