Four members of the Derby Watch top 20 worked this morning in South Florida.

Here at Gulfstream Park, Free Drop Billy went five furlongs in 1:02.73 for trainer Dale Romans for next Saturday's Gotham Stakes at Aqueduct. He has been scratched from the Fountain of Youth today.

Over at the Palm Beach Downs training center, trainer Todd Pletcher worked three of his runners a half-mile, with requisite gallop outs.

Audible, awaiting the Florida Derby, was timed in 49.13 seconds.

Magnum Moon, set for the Rebel at Oaklawn on March 17, also went in 49.13.

Noble Indy, who will go to Fair Grounds for the Louisiana Derby March 24, was timed in 49.21.