Colorado Rockies relief pitcher Pat Neshek is a major leaguer and colleague of Zack Greinke's, but he was still reportedly upset the Arizona Diamondbacks ace didn't sign autographs for him at the All-Star Game.
According to ESPN.com, Neshek posted on a message board on the website SportsCollectors.net using the username "heat17" and criticized Greinke because he "backed out on a promise to sign baseball cards for him."
The ESPN.com story called Neshek "a noted autograph hound."
This article will be updated to provide more information on this story as it becomes available.