Yarbrough took the loss on Thursday against the Astros, when he allowed one run on seven hits in 6 1/3 innings. Left-handers are hitting just .205 against Yarbrough this season. The rookie is 3-1 with a 4.24 ERA in eight road appearances.
Richards was roughed up by the D-backs in his last outing, completing just four innings and allowing three runs on six hits. The rookie is 0-2 with a 12.91 ERA in two Interleague starts this season.