"But he hasn't pitched horribly," Yost said.
And Parra took a big step by rebounding from a poor first two innings against the Cardinals on Friday to work through the fifth.Villanueva's numbers have been skewed by a handful of very bad innings, Yost argued, especially in his two most recent starts, and the Brewers have identified a fix the manager would not elaborate on. Yost also alluded to mechanical adjustments in the works for Bush. "I don't know what you guys want, but we don't cut and run until its evident that we need to," Yost said. "We continue to work hard in the areas that will make us better, and we still see plenty of room for an improvement. We have an idea of what we think will make David Bush better, and David works his tail off to get better. That's what we will continue to do for the time being. That goes for all of our pitchers. "We still see light at the end of the tunnel for these three guys. We still think that they can be a successful, productive part of our staff." The Brewers are hampered in that they are short on backups. Jeff Weaver, who signed a Minor League deal with the team last month, was not as effective in his latest start for Triple-A Nashville on Sunday, according to Melvin, and once Weaver is called up to the Majors, he cannot be sent back down. Right-hander Mark DiFelice and left-hander Chris Narveson are even more unknown than Weaver. McClung is 12-20 with a 6.18 ERA as a Major League starter, and he has spent all of this season as a reliever. The Brewers are not sure how much they could get out of McClung in a start. "It may get to where we have to find out," Yost said. "But we're not there yet." "We have to be a little careful," Melvin said. "We don't necessarily have the [pitching] depth you'd like to have."
Adam McCalvy is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.