SARATOGA SPRINGS, N.Y.--One of the most anticipated horses on the grounds at Saratoga comes to the races on Saturday. His name is Sovereignty (Into Mischief) and he is the unquestioned headliner in the GII, $500,000 Jim Dandy Stakes, the traditional local prep for the GI, $1.5 million Travers Stakes on Aug, 23. Why shouldn't he be? He has already won the GI Kentucky Derby and GI Belmont Stakes and is regarded as the best 3-year-old colt in the land. Jockey Junior Alvarado, who has ridden Sovereignty in six of his...