Lewis Rollins struck out nine over six scoreless innings as visiting Columbus beat Savannah, 5-2, on Wednesday night.
Rollins held the Sand Gnats (10-29) to a pair of first-inning singles and did not allow an earned run for the sixth straight start.
The 21-year-old right-hander has yielded just one run over his last 38 innings and is second in the South Atlantic League with a 1.12 ERA. His 55 strikeouts are tied with Rome's Thomas Hanson for the league lead.
Ryan Reid pitched a scoreless ninth to notch his third save for the Catfish (27-13), who have won seven of their last eight games.
1B Matt Fields took over the team lead in RBIs (27) with his 2-run homer in the 2nd, and his RBI double in the 6th.
The 4-game series continues tonight in Savannah.