Francisco Arrieta

Joe Peacock, Jr.'s Senor Buscador (Mineshaft), who earned a berth in the field for next Saturday's GI BigAss Fans Breeders' Cup Dirt Mile via his mild upset in the GIII Ack Ack S. at Churchill Downs Oct. 1, tuned up for that engagement with a 'solid' five-furlong work in the company of his GII Thoroughbred Aftercare Alliance-bound stable companion Sheriff Brown (Curlin) beneath jockey Francisco Arrieta at Keeneland Thursday morning. "We got what we wanted," trainer Todd Fincher said. "Senor Buscador started about six lengths back and got to the...