Clayton Mortensen spun five shutout frames and combined with three relievers on a three-hitter as Omaha blanked Oklahoma City, 2-0, Wednesday night in the second of four meetings at Bricktown Ballpark.
The Storm Chasers won their third game in a row to improve to 26-26 to reach the .500 mark for the first time since April 24.
OKC starter Rudy Owens blanked the Storm Chasers on four hits while striking out seven over 6 2/3 innings before giving way to Josh Zeid, who got the final out in the seventh inning.
Omaha then broke through against the right-hander in the eighth after Paulo Orlando tripled with one out and scored the game’s first run when Christian Colon followed with a base hit.
The visitors added an insurance run in the ninth against former Kansas City farmhand Kevin Chapman when Carlos Peguero walked, moved to second base on a passed ball, advanced to third on a Francisco Pena single and scored on a throwing error on the play by second baseman Enrique Hernandez.
Mortensen, making his first start of the season after recovering from hip surgery, allowed two hits, walked two and fanned four.
Casey Coleman took over in the sixth and worked a pair of scoreless frames to earn the win after giving up a hit, walking two and striking out one.
Wilking Rodriguez set down the side in order in the eighth and gave way to Spencer Patton, who closed the door in the ninth to earn his ninth save of the season.