Coleman Stephens held the McAllen Thunder (20-37) scoreless for 6 2/3 innings to boost the Rio Grande Valley Whitewings (32-24) to a 5-0 victory.
Stephens allowed four hits, one walk and struck out five.
Mario Mercedes went a perfect 3-3 at the dish for the Rio Grande Valley Whitewings. He singled in the first, third, and sixth innings.
Alex Smith ended up on the wrong side of the pitching decision, charged with his second loss of the year. He lasted just 6 2/3 innings, walked three, struck out four, and allowed five runs.