Authentic (Into Mischief), winner of the Sept. 5 GI Kentucky Derby, worked for the final time prior to the Oct. 3 GI Preakness S. with a four-furlong move in :47.60 at Churchill Downs Monday morning. The Bob Baffert trainee recorded splits of :12.20, :24, and :36, then galloped out five furlongs in 1:00 and three-quarters in 1:13.40. Jockey Martin Garcia was aboard for the 7:30 a.m. move. "He's such an amazing horse," Garcia said following the work. "He worked awesome. I've worked a lot of nice horses for trainer Bob...