LOUISVILLE, KY - Flagstaff (Speightstown) kicked on gamely in a wild, blanket finish to lead home a one-two for his leading sire in the GI Churchill Downs S. Saturday. It was a head back to Lexitonian (Speightstown) in second; and another nose to champion sprinter Whitmore (Pleasantly Perfect) in third. "I'm thrilled," winning trainer John Sadler said. "He's a real hard knocker; he always runs his race. He knocked it out today." Flagstaff, a last out winner of Keeneland's GIII Commonwealth S. Apr. 3, his first win in 13 months,...