With the loss, K-State fell to 25-22 overall and 8-16 in Big 12 play, while Oklahoma improved to 26-21 and 9-12.
The Wildcats took a 4-1 lead into the ninth until Oklahoma mounted its second straight ninth-inning comeback. Kevin Smith launched a pinch-hit solo homer off starter Adam Cowart to cut the margin to 4-2, before Russell Raley reached on an error by third baseman Eli Rumler. After a single and a fielder's choice, Jeff Scuderi hit a three-run homer to left off Cowart to give the Sooners their first lead of the day at 5-4.
K-State rallied again in the bottom of the ninth for the second straight game as Eric Eymann led off with a triple to left and then scored the tying run on Terry Blunt's check-swing double down the right field line. But, Jared Goedert and Cris Tapia eached flied out, thus sending the game into extra innings.
Cowart held Oklahoma scoreless until Kody Kaiser's solo homer in the eighth, which cut the Wildcats' lead to 4-1. Cowart surrendered four earned runs on the day on eight hits while also striking out eight batters. Mitch Walter (2-4) took the loss in relief by giving up just one hit, the Rohlinger solo homer in the 10th.
Will Savage (7-3) earned the win in relief after his 1.2 no-hit innings.
K-State jumped out to a 2-0 lead in the fifth as a Brandon Farr sacrifice fly and a bases-loaded balk by pitcher Brad Burns gave the Wildcats the early lead. Then, in the sixth, a two-run double from Eli Rumler with two outs upped the K-State lead to 4-0.
Rumler was the lone Wildcat to have a multi-hit game after a 2-for-4 day, while six other Wildcats recorded a hit apiece.
Kansas State returns to action this Friday as Northern Colorado visits Tointon Stadium for a three-game non-conference series. First pitch on Friday is set for 7 p.m.