The TinCaps (30-22) survived four unearned runs thanks to seven extra-base hits in a 7-4 win against the Lugnuts (21-29) on Thursday.
The victory moved Fort Wayne a half-game ahead of Bowling Green in the Midwest League Eastern Division with 17 games to go before the end of the first half of the season.
Fort Wayne earned its third sweep this month and fifth overall. The TinCaps have won five straight since ending a season-worst five-game losing streak.
Fort Wayne faces West Michigan – the only team on the rest of the TinCaps' first-half schedule with a record above .500 – at 7:05 p.m. today in the first of a three-game series at Parkview Field.
The Whitecaps are 26-25 overall and 12-14 on the road.