Omaha had Wednesday off and begin an eight-game homestand on Thursday night, beginning with Reno.
NW Arkansas won their fifth in a row in beating Arkansas, 4-3. The Naturals look for the series sweep on Thursday.
The Naturals offense was led by Balbino Fuenmayor, who doubled twice to drive in three runs. He gave NWA their first lead of the game in the bottom of the eighth with a two out, two-run double. Mike Bianucci hit his ninth home run of the season in the seventh.