The connections of horses now off the Triple Crown trail have begun to plan new courses for their respective horses, with Palmeiro entered to run Monday against older horses in a Hollywood Park allowance race. Trainer John Sadler hopes to use the 1 1/16-mile race as a prep for the $150,000 Affirmed Handicap.Palmeiro will face six older horses and one fellow 3-year-old as the 9-5 morning-line favorite while breaking from the extreme outside post. Palmeiro finished second in both the Santa Catalina (gr. II) and San Rafael (gr. II) Stakes, before finishing fourth – beaten by 11 lengths -- in the Santa Anita Derby (gr. I). The son of Pleasant Tap is winless since breaking his maiden in his fourth career start in December.Palmeiro will face another horse that prepped for a Triple Crown run in the Bob Baffert-trained Black Mercury. Black Mercury came home second in the 1999 Rushaway Stakes before finishing fourth in the Lone Star Derby. Now five, the son of Tactical Advantage has won one race in 16 career starts while finishing third on eight occasions.Trainer Jim Cassidy said Jamaican Rum will likely return to the turf course for his next start, which will probably come in the $100,000 California Sire Stakes at Hollywood Park on June 9."He's been galloping the last five days and may work Friday or Sunday," said Cassidy. "He really likes this track (Hollywood Park)."After finishing sixth in the Kentucky Derby (gr. I), Eddie Delahoussaye, Jamaican Rum's jockey, said, "I think he'll be a better grass horse, though. He's bred top and bottom for it."Jamaican Rum has raced on turf once previously, winning the Hill Rise Stakes by a neck over Startac.Startac, meanwhile, will be given two months off after finishing tenth in the Derby. The Simon Bray trainee will then return to turf racing. Startac has two wins in four career turf starts, finishing second and third in his only defeats on that surface. The Allen E. Paulson-bred son of Theatrical won the Generous Stakes (gr. IIIT) on the Hollywood Park turf course as a juvenile.Arctic Boy was a late addition to the Derby field after having shipped to Churchill to race at the allowance level. Trainer Tony Richey said the colt has trained well since the race and will return in an allowance race soon. Arctic Boy is by Maria's Mon, sire of the Derby winner. Arctic Boy faded to finish 12th in the Derby.