The World Series is almost underway, which means that the official start of the offseason is rapidly approaching. When the free agent market opens up, one of the central figures will be Zack Greinke, who is the clear top dog in a deep pitching pack. The former Cy Young winner offers ace-level ability, youth and a durable track record. Sure, there are a few question marks surrounding the right-hander, who turns 29 this weekend. He's had some anxiety issues ...