Rick Porter, owner of Rockport Harbor, said that although the colt is doing much better after suffering his third setback of the year, he is 50-50 at best to make the April 16 Arkansas Derby (gr. II), and that the April 23 Lexington Stakes (gr. II) at Keeneland appears to be the more likely spot at this time."Rockport Harbor had his last work canceled after suffering from a blood clot, and would be hard pressed to make up for the time he has lost."John (trainer Servis) took 'Rocky' to the track (Wednesday) and jogged him a mile," Porter said. "John said he couldn't have done it any better. All is good right now, but time is our enemy. The Lexington Stakes seems more appealing at this time unless Rocky shows us he is really up to the Arkansas Derby. John plans on giving him strong gallops Thursday through Saturday, then a strong mile work on Sunday. I just hope we can stick to the plan. Sunday will be the real test." The Arkansas Derby is expected to attract Southwest and Rebel (gr. III) winner Greater Good; Mountain Valley winner Afleet Alex, who suffered a lung infection in the Rebel; the lightly raced Flower Alley, winner of the Lane's End Stakes (gr. II); Wild Desert, runner-up in the Lane's End; and Sam Davis winner Andromeda's Hero, fifth in the Lane's End.