Keller (4-10) did not factor into the decision in a win over the Cardinals on Thursday, pitching 5.1 innings while allowing seven runs on six hits with three walks and two strikeouts.
The right-hander struggled out of the gate and surrendered seven runs across his first three innings, but he was able to settle in to provide some length for the Pirates. After allowing no runs to the Cardinals in his previous start, Keller struggled against Thursday, throwing only 51 of his 90 pitches for strikes. The 25-year-old will carry a 6.75 ERA into his next start, tentatively scheduled against the White Sox on the road next week.