NL Central Links: Greinke, Duncan, Reds

Here's the latest from the NL Central…

• Brewers GM Doug Melvin said he hasn't received many phone calls about Zack Greinke, though some teams have subtly expressed interest, reports Tom Haudricourt of the MIlwaukee Journal Sentinel.  “I think, respectfully, general managers don't call when you're eight games out [in the division], six games out of a wild card," Melvin said. "They don't call but their let their interest be known in a different way. Their scouts will talk to our scouts and say, 'We're interested in somebody.' "
• Melvin also said that it's doubtful Greinke would sign an extension with the Brewers before the trade deadline. "When players get this close (to free agency), there's not many that will sign, at that (talent) level,” said Melvin. “He's a difference-maker to a team that's got a chance to go to the post-season. Unless you're raising the bar (to a higher salary), you usually go on the market.”
• Dave Duncan served on Tony LaRussa's staff for the All-Star Game but otherwise, the veteran pitching coach seems like he is retired, writes Rick Hummel of the St. Louis Post-Dispatch.  Duncan took a leave of absence from the Cardinals last winter to take care of his wife, who is suffering from brain cancer.
• The Reds need a leadoff hitter, and John Fay of the Cincinnati Enquirer speculates that Juan Pierre or Denard Span could be a fit.  Fay says it's possible the Reds could acquire a center fielder instead of a left fielder, as Drew Stubbs has struggled this season.