SARATOGA SPRINGS, N.Y. - When the phone rang, Hall of Fame jockey Mike Smith was on the other end. "I'm on the treadmill," Smith said. Of course he was. Smith, who will ride 'TDN Rising Star' Rodriguez (Authentic) in Saturday's $2-million GI Belmont Stakes at Saratoga Race Course, has always been obsessed with working out. And, as he closes in on his 59th birthday (Aug. 10), he has no intentions of pulling the plug on his two-hour, five-day-a week workout schedule. Nor are there any plans to hang up his...