Brady Aiken, the hard-throwing lefty who didn't sign after being last year's No. 1 draft pick by the Houston Astros, announced Thursday he had Tommy John elbow surgery. The 18-year-old Aiken was pitching for the IMG Academy, a private training institute in Florida, to prepare for this year's draft after a contract dispute with the Astros left him unsigned. In an essay published Thursday for The Players' Tribune, the website created by Derek Jeter, Aiken broke the news himself. ''I'm obviously extremely disappointed,'' Aiken wrote. More...