Disco Time (Not This Time) remained perfect via a tour de force performance in the St. Louis Derby at Fairmount. Last seen Jan. 18 when winning the GII Lecomte Stakes at the Fair Grounds, his prior two victories came at Churchill Downs when he broke his maiden last November and then beat optional claiming company 29 days later Nov. 30 from the front end. The even-money favorite here, Disco Time left the blocks on top and never gave the field a chance. Never in any danger after an opening quarter...