Barring a late change of heart, the Astros appear set to start using a six-man rotation instead of five. Lefthander Dallas Keuchel has been informed he’ll start Friday against the Rangers, and Brad Peacock is scheduled to start Saturday. Erik Bedard seems likely to start Sunday. “We’re definitely considering it,” manager Bo Porter said. “It’s one of those things; we have six guys that have thrown the ball well. As you start to get to this portion of the season, you definitely want to monitor the innings of a lot of these guys to make sure they’re not being overused or throwing too many more innings than what they threw [...]