LOUISVILLE, Ky. – Led by a trio of prospects from Kentucky Derby-winning trainers Brad Cox and Todd Pletcher, a total of 11 horses with designs on the Derby one week hence worked at Churchill Downs on Saturday morning. They were part of a frenetic day of activity that included a drill at Keeneland for another Derby-winning trainer, a postponed work at Gulfstream, and works at both Belmont Park and Monmouth for horses who likely won’t end up running. The day began early, shortly after the track opened at 5:15 a.m. Eastern, with Cox sending out Cyberknife and Zozos for a team drill. They began their works at the five-furlong pole, with Cyberknife starting about one length back. They were even at the finish line, so Daily Racing Form's Mike Welsch credited Cyberknife with a five-furlong drill in 58.84 seconds, Zozos one-fifth slower, in 59.04. Florent Geroux, who rides Cyberknife in the Derby, was aboard for the work. Flavien Prat worked Zozos. Prat rides Zandon for trainer Chad Brown in the Derby. Manny Franco rides Zozos in the Derby. “Really liked it,” Cox said of the works, which he watched from the front side. “Good works. Both seemed in hand, had a strong gallop-out.” Cyberknife most recently won the Arkansas Derby. Zozos was second in the Louisiana Derby to Epicenter. Cox's third horse, Lexington Stakes winner Tawny Port, was one of nine Derby runners who worked here shortly after the renovation break ended at 7:30 a.m. He went a half-mile in company in 49.42, also with Geroux. Cox earlier Saturday said that Ricardo Santana Jr. had been given the Derby mount. Pletcher worked his trio after the break, with Charge It and Pioneer of Medina going together. They were timed going a half-mile in 47.66, with the typical extensive gallop-out that Pletcher prefers, the work proceeding in the midst of an announcement of a loose horse, which caused sirens to blare. Pletcher was watching the work from the front side and saw the loose horse exit the track on the backside while his horses were coming through the stretch. Because he is in radio contact with his riders – including jockey Luis Saez on Charge It – Pletcher was able to instruct them that it was safe to continue, so what could have been an aborted final drill for the Derby ended up working out almost as well as could be hoped. “I caught the loose horse out of the corner of my eye,” said Pletcher, who said hearing the siren go off “is not what you want to hear during your final work for the Derby.” “No harm, no foul,” he said. :: Get Derby Clocker Reports from Mike Welsch and the DRF Clocker Team to access exclusive insights from the morning workouts Moments later, Mo Donegal, under Irad Ortiz Jr., also worked in company for Pletcher, appearing slightly best in a 48.83 half-mile, with a more abbreviated gallop-out being as his race was more recent than the other pair. Pioneer of Medina is currently 21st on the points list, though he’s likely to make the top 20 by entry time Monday assuming Early Voting comes out. Early Voting worked five furlongs in 1:00.64 on Saturday at Belmont Park under Jose Ortiz, who rides Simplification in the Derby. Early Voting’s trainer, Chad Brown, said he would wait until Sunday to decide whether to run, but all appearances are it will take an unexpected, major defection for him to ship here instead of awaiting the Preakness on May 21. Pletcher said that in the event Pioneer of Medina is still 21st at entry time Monday, he’d “have to think about” whether to put him on the also-eligible list. Only the top 20 draw for posts, with up to four also-eligibles, in points order. Next on the points list after Pioneer of Medina is In Due Time, who worked a half-mile in 48.80 on Saturday at Monmouth Park. He is unlikely to enter the Derby, trainer Kelly Breen said Saturday. Trainer Kenny McPeek worked his pair of Smile Happy and Tiz the Bomb after the break. Although they were supposed to go together, Tiz the Bomb, under Brian Hernandez Jr., was keen to proceed, and broke off well in front of Smile Happy and Corey Lanerie, who chose not to chase. Daily Racing Form had Tiz the Bomb going a half-mile in 49.03, Smile Happy – who closed the gap on his stablemate – in 48.63. “Corey made the decision to sit back and not force it, and that probably was the smart move,” McPeek said. :: Kentucky Derby Headquarters: Get the latest news, info on contenders, past performances, picks, and more  Classic Causeway, a major disappointment when last of 11 in the Florida Derby, had his second straight strong drill coming out of that race for trainer Brian Lynch, going six furlongs in 1:13.26 under Julien Leparoux. “They told me to go in 1:13. I went 1:13 and one. Not bad,” Leparoux said, smiling. “It went perfect.” Barber Road, trained by John Ortiz, was timed by Churchill Downs going a half-mile in 48.40, with Daily Racing Form getting his final quarter in 25.23. Un Ojo went a half-mile in 47.59 for trainer Ricky Courville. At Keeneland, two-time Derby-winning trainer Doug O’Neill sent Happy Jack through a one-mile work in 1:39.60 under jockey Rafael Bejarano. “Getting pumped for next Saturday,” said O’Neill, who said Happy Jack was to van to Churchill on Sunday. White Abarrio, the Florida Derby winner, had his drill that was scheduled for Saturday morning postponed due to heavy rain at Gulfstream Park. He finally got to work just after 6 p.m. between the final two races on Saturday’s Gulfstream card, going four furlongs in 48.11 followed by a very strong and impressive gallop-out. His trainer, Saffie Joseph Jr., said White Abarrio is scheduled to leave Florida by van on Sunday morning. White Abarrio is among the handful of Derby runners still to arrive at Churchill Downs, including the West Coast duo of Messier and Taiba, who were scheduled to be flown from California on Sunday, trainer Tim Yakteen said. – additional reporting by David Grening, Marty McGee, and Mike Welsch