Augusta starter Brian Irving (6-5) suffered his worst loss of the season, surrendering seven earned runs on eight hits and a walk over five innings. The four first-inning runs came on four hits, including a two-run homer from Jonathan Meyer, his second of the season.
GreenJackets designated hitter Tommy Joseph responded with a three-run homer in the bottom of the first. The 19-year-old second-round draft pick also drove in Augusta's fourth run of the game with a sacrfice fly to the warning track in center field in the bottom of the eighth.
Augusta pitcher Jeremy Toole relieved Irving and hit the first two batters he faced to start the sixth. Both runners were caught stealing, and Irving retired the next seven batters to complete three scoreless innings.
Lexington starter Luis Cruz (6-4) settled down after the first and didn't allow a run over the final six innings he pitched.
Reliever Wander Alvino came on in the eighth and allowed the run to Joseph, and closer Kirk Clark had some trouble in the ninth.
Augusta's Jesse Shriner singled to start the bottom of the ninth inning and Ryan Lollis doubled. Lexington traded runs for outs with both runners, and Clark retired Skyler Stromsmoe on a called third strike to end the game and get the save.
The announced crowd of 5,230 fans marked the fourth largest of the season at Lake Olmstead Stadium and the most since July 3.