Mackinnon was three races into his career before his first win in a one-mile maiden special weight race on turf on July 31 at Del Mar. “He’s a colt that has always been impressive to be around,” trainer Doug O’Neill said Friday. “I was a little disappointed in his first couple of races. He put everything together.” Mackinnon’s July victory has led to his stakes debut in Monday’s $100,000 Del Mar Juvenile Turf at a mile on closing day of the track’s summer meeting. Los Alamitos begins the three-week Los Angeles County Fair meeting on Friday. It is not lost on O’Neill, or owners Erik Johnson and Dave Kenney, that the Del Mar Juvenile Turf is run on the same course and distance as the Breeders’ Cup Juvenile Turf on Nov. 5. “That is the goal,” O’Neill said. “You start thinking that way. He gives us those kind of hints. “We need a few more efforts to get there.” :: DRF’s Labor Day Sale: Save big on DRF Formulator Past Performances, Picks, Clocker Reports, Betting Strategies, and DRF+ Pro. Limited time only. Mackinnon is named after Nathan MacKinnon, Johnson’s star teammate on the Colorado Avalanche of the National Hockey League. Mackinnon, the colt, was a well-beaten fourth on dirt in a maiden special weight race in his debut at Santa Anita in May, and second in his turf debut in a maiden special weight race at 5 1/2 furlongs there in June. The move to two turns helped Mackinnon to a breakthrough win. Juan Hernandez was aboard Mackinnon in his two turf races and has the mount Monday against eight rivals. None of the runners has won or placed in a stakes. Aquitania Arrival was fifth by 11 lengths as the 2-1 favorite in the Grade 2 Best Pal Stakes at six furlongs on dirt in his California debut Aug. 7. “I don’t think he’s a big fan of this racetrack, that’s all I could surmise,” trainer Peter Miller said. “We don’t know where he fits from a class level.” :: DRF's Del Mar headquarters – Stakes schedule, previews, recaps, past performances, and more Miller said the Del Mar Juvenile Turf is an experiment for Aquitania Arrival, who won his debut in a restricted maiden race at Churchill Downs in June when trained by William E. Morey. The maiden race was limited to horses who were listed as sold or bought back for $45,000 or less in their most recent appearance in an auction. “He’s worked a lot better on grass than he worked on the dirt,” Miller said. “I’m looking forward to seeing what he can do.” The remainder of the field includes European imports Optimising and Silver Surfer, maidens Mogollon Rim, My Mane Champ, and Thirty Four Coupe, and maiden race winners Shortman and Socal Red. :: Bet the races with confidence on DRF Bets. You're one click away from the only top-rated betting platform fully integrated with exclusive data, analysis, and expert picks. Silver Surfer, previously trained by Donnacha O’Brien in Ireland and now trained by Phil D’Amato, won a six-furlong maiden race on June 11 at Fairyhouse in his fifth and final start in that country. Optimising, now trained by Michael McCarthy, won an allowance race on the all-weather surface at Wolverhampton Racecourse in England in June in his only previous start when trained by Michael Bell.