SARATOGA SPRINGS, N.Y. - When he found out he was going to need a new jockey, John Shirreffs didn't blink. He knew who was going to ride Baeza (McKinzie) in Saturday's $500,000 GII Jim Dandy Stakes at Saratoga Race Course. And the jockey isn't all that new, not to Baeza. Baeza will be reunited with California-based Hector Berrios when he steps on the track to take on GI Kentucky Derby and GI Belmont Stakes winner Sovereignty (Into Mischief) and three others in the 1 1/8-mile traditional prep for the Aug....