The Albuquerque Isotopes' postseason hopes were put in grim jeopardy with Alex Castellanos' swinging strikeout in the ninth inning Sunday night.
That was the final out of Oklahoma City's 5-4 victory that enabled the host RedHawks (73-56) to clinch the five-game series and open up a six-game lead on the Isotopes (67-62) with 15 games to play.
Albuquerque will have two more chances to try and cut into that lead but at this point faces a steep uphill battle.
Oklahoma City ran out to a 5-0 lead before the Isotopes began to rally with Eliezer Alfonzo's two-out, two-run double in the sixth inning finally putting Albuquerque on the board.
Matt Angle followed with a two-out, RBI single in the eighth to make it 5-3.
In the ninth, Jorge De Leon got the first two outs but then gave up a single to Dee Gordon, who advanced to second on defensive indifference and came around to score on Elian Herrera's double to center field. De Leon then whiffed Castellanos to earn his third save.
Starter Asher Wojciechowski (8-6) was affected for 7.1 innings, allowing three runs on seven hits and one walk while striking out eight batters.
Albuquerque starter Matt Palmer (6-7) gave up five runs, four earned, on seven hits and two walks in seven innings.
Oklahoma City got a two-run single from Che-Hsuan Lin in the second inning to jump ahead. George Springer then led off the fourth with a home run to left field. Jimmy Paredes would later add an RBI triple and score on a groundout to make it 5-0.
The Isotopes will try to regroup and end the RedHawks' 15-game home winning streak Monday at 6:05 p.m.