'TDN Rising Star' Newgate (Into Mischief), the winner of last Saturday's GIII Robert B. Lewis S. at Santa Anita under Frankie Dettori, has been diagnosed with a minor hock issue that will prevent him from making a start in the GI Kentucky Derby. The news of the injury was announced on Twitter early Friday by Tom Ryan, the managing partner of one of the colt's owners, SF Racing LLC. "His prognosis to return is excellent," Ryan wrote. "We look forward to seeing him back this summer." Ryan also wrote that...