Gotham Stakes (gr. II) runner-up Pomeroy, gearing up for his next start in the April 17 Coolmore Lexington Stakes (gr. II) at Keeneland, worked six furlongs in 1:14 3/5, breezing, in company with stablemate Tarkovsky, who was clocked in 1:14 2/5, over Santa Anita's fast main track Tuesday morning. Regular exercise rider Jean Claude was in the irons for the drill, which was the 13th fastest of the 19 horses who worked six furlongs."It was a very good work," trainer Patrick Biancone said. "It was just maintenance. What's important is that he pulled up good, came back to the barn good and we're on the road to the Lexington."While a strong performance in the Lexington could put Pomeroy squarely on the path to the May 1 Kentucky Derby (gr. I), Biancone said he's not putting any focus on anything other than the next start for the bay son of Boundary."We'll see; he's still in the shadow of (Lion Heart)," Biancone said. "It's still premature to think about the Derby without the money to get in (the body of the race)."Pomeroy, who also won the Kentucky Cup Juvenile (gr. III) before being disqualified to third and was second in the Saratoga Special (gr. II), has banked a total of $128,000 with a record of 5-2-2-1 of which $80,000 is graded stakes earnings.Biancone also reported that Toyota Blue Grass Stakes (gr. I) contender Lion Heart came out of his Monday work in good order and would be flown to Lexington early Monday morning."Perfect," Biancone said. "We know we chose the toughest Derby prep race because it's the only one with three grade I winners (Action This Day, Birdstone and Lion Heart.)"Also working on Tuesday was Arkansas Derby (gr. II) contender Mambo Train, who posted a time of :49 for his half-mile. The Marcelo Polanco-trained colt, who won the Turf Paradise Derby in his last start, is set to leave for Hot Springs on Wednesday."I caught him in :47 2/5," Polanco said. "And he galloped out in 1:02. It was a good work and he's ready to go."Mambo Train, a bay son of Kingmambo and the Houston mare Ticket to Houston, has earned $97,400 with his record of 7-2-1-0 and so far has no graded stakes earnings.