Arizona entered the ninth inning up 5-4 after a Bobby Dalbec RBI single in the 7th gave the Wildcats the lead.
Well, Dalbec had the chance to close out the game as well, but Washington St. was having none of that.
After a strikeout and a groundout to start the ninth, Trent Gilbert booted a ball hit to his right, which allowed Nick Tanielu to reach base.
Next up, Yale Rosen lined one to right center, putting runners on second and third for P.J. Jones. Rosen was pinch run for by Cameron Frost.
Jones entered the night 0-for-31 on the season, but had already picked up his first two hits of the season on Saturday night.
Jones managed to get his third hit of 2014 on a chopper to shortstop Kevin Newman, and Frost showed why he was put in the game as a pinch runner.
Newman''s throw to first was late, and Frost was able to score from second on the play, giving Washington St. the 5-4 lead.
"I thought we had him by a hair," Dalbec said. "But it happens. It was really close. (Frost) is a fast kid, good play on his part."
"They did a good job on the bases there, spinning that runner at third," Lopez added. "Good aggressive base running on the road is what you need to do. But I thought Bobby came in and did a good job."
Arizona had a small chance in the ninth after Gilbert singled up the middle with one out. Zach Gibbons and Michael Hoard each struck out after that hit which ended the night and allowed WSU to even up the weekend series.
The Wildcats still have a chance to win the first Pac-12 series of the year Sunday at noon. Austin Schnabel will be on the mound vs. Tanner Chleborad.