Jockey Junior Alvarado, who has ridden leading GI Kentucky Derby chance Sovereignty (Into Mischief) in each of his four career starts to date, will miss about three weeks after fracturing his shoulder blade in a Sunday accident at Gulfstream Park. Daily Racing Form was first to report the news. Alvarado's mount in Sunday's 10th race at Gulfstream Park, Term (Medaglia d'Oro), suffered a fatal heart attack, according to DRF, and the rider's agent Mike Sellitto told the publication that Alvarado was looking after his horse when he was clipped by...