Quick Hits: Zambrano, Dodgers, Mattingly, Astros

Even after signing Carlos Zambrano this week, the Phillies might not be done shopping for pitching, tweets Jayson Stark of ESPN.com.  When asked if the club is still considering starters with opt-outs, team exec Scott Proefrock said "we're still scouting".  Here's more from around baseball..

• It may not be fair, but Dodgers skipper Don Mattingly will be expected to turn things around once Zack Greinke is back in action, writes Jon Heyman of CBSSports.com.  The banged up Dodgers are 16-22 heading into tonight's game versus the Nationals.
• After announcing the departure of team president George Postolos this week, Astros owner Jim Crane reached out to one of the most beloved figures in club history in Larry Dierker, writes Jose de Jesus Ortiz of the Houston Chronicle.  For his part, the 66-year-old is definitely open to returning to the organization.
• Meanwhile, Reid Ryan, son of Rangers CEO Nolan Ryan, is being strongly considered by the Astros to become the team's next president, according to Mark Berman of FOX 26.