The Buffalo Bisons beat the IronPigs for the third straight time on Sunday, 4-1 at Coca-Cola Park.
The win came after Buffalo swept a double-header from the 'Pigs to open the weekend series on Saturday.
The 'Pigs only run came on a throwing error in the sixth inning, which allowed Tyson Gillies to score from first after a Cesar Hernandez single.
B.J. Rosenberg (0-1, 5.52) took the loss for the IronPigs.
The 'Pigs (7-9) are now 5-2 on the road, but just 2-7 at home this season. Buffalo has now won seven in a row.
The IronPigs will look to avoid the series sweep when they wrap up their series with the Bisons on Monday morning at 10:35am at Coca-Cola Park.