Singer (9-11) took the loss Sunday against Pittsburgh, allowing four runs on six hits and four walks across five innings. He struck out six.
Singer's four walks marked a season high, and he failed to complete six innings for a third consecutive outing. The 27-year-old has a 5.40 ERA and a 1-5 record across his last eight starts (43.1 innings). Singer is tentatively scheduled to face the Giants in Kansas City next weekend.