Frank Fletcher Racing Operation's Rocket Can (Into Mischief) turned in his penultimate workout ahead of the May 6 GI Kentucky Derby with a five-furlong drill in 1:01.00 (11/41) at Churchill Downs Sunday. The gray colt, who broke off six lengths behind stablemate Game Warden (Tapit), completed early fractions of :12.20 and :36.60 with regular exercise rider Guelser Cardona in the saddle. He finished even with his stablemate at the wire and galloped out several lengths in front through six furlongs in 1:14.20. "It was a nice, steady work," trainer Bill...