The GreenJackets’ losing streak extended to a season-high six games with their sixth shutout.
Augusta showed promise in July with a second-half surge that launched the Jackets into first place in the South Atlantic League’s Southern Division just 15 days ago.
But 11 losses over their past 15 games have the GreenJackets (20-22, 52-59) now 8½ games out of first behind the Rome Braves and their 13-game winning streak.
“Teams sometimes go through tough times when things aren’t going the way they should be going,” manager Lipso Nava said.
“The effort was there tonight. It was the execution that was lacking.”
A two-base error by third baseman Jose Cuevas led to one run. Starter Paul Davis and reliever Kyle Vazquez allowed the rest.
Charleston, which had lost 10 of its past 11 games entering the series, won its second in a row with hits from eight different batters.
“We went through a rough stretch there, but the guys are playing hard,” RiverDogs manager Carlos Mendoza said. “We’re finally seeing some results.”
Mendoza limited Charleston starter Scottie Allen to just two innings but had a strong backup with Brett Berritse. The 21-year-old right-hander took over in the third and fired six shutout innings for his fourth win.
Davis (5-5) allowed four runs, three earned, over six innings. He struck out five, walked none and left trailing 4-0.
Kevin Couture threw two scoreless innings of relief, but Kyle Vazquez took over in the ninth and allowed two runs on three hits.
Charleston’s Saxon Butler, Cody Grice and Francisco Arcia each went
2 for 4 with at least one run scored.
The RiverDogs scored twice in the third on three singles and once each in the fourth and fifth innings.
Shortstop Cito Culver, the New York Yankees’ first-round pick in 2010, drove in three runs, including a two-run single in the ninth.
An announced crowd of 4,067 saw the GreenJackets suffer a home shutout for the fifth time this season.