Peterson (7-5) took the loss Wednesday, allowing five runs on two hits and three walks over one-third of an inning in a 6-3 loss to the Cubs. He struck out one.
Peterson's disastrous outing began with three straight walks and ended with back-to-back two-run doubles from Yan Gomes and P.J. Higgins. The lefty had allowed less than four runs in 11 straight starts dating back to June 15, a span during which the 27-year-old recorded seven strikeouts or more eight times.