A trio of candidates for the GI Preakness S. at Pimlico Oct. 3 turned in their final serious moves Saturday morning at Churchill Downs. Bruce Lunsford's Art Collector (Bernardini), who was forced to miss the Sept. 5 GI Kentucky Derby owing to a minor foot injury, tuned up for the final leg of this year's reconstituted Triple Crown by drilling a half-mile in :48 flat with big-race rider Brian Hernandez, Jr. in the saddle. The GII Toyota Blue Grass S. and Runhappy Ellis Park Derby hero was caught in fractions...