Eternal Prince, one of the favorites for Saturday's 110th running of the Preakness Stakes at Pimlico, worked six furlongs at the Baltimore track this morning in 1:11 1/5 under his new jockey, Chris McCarron.

"He's ready. He got in that traffic jam in the Derby, but I'm convinced he'll get and keep the lead on Saturday," trainer John (Butch) Lenzini said after the workout.

"McCarron is the best rider in the country and, with a short blowout on Thursday or Friday, and everything will be on schedule. (Kentucky Derby winner) Spend a Buck is a very fast horse, but I can say without reservation that we will never duck him."

Eternal Prince finished 12th in the Kentucky Derby under Richard Migliore, who was replaced by McCarron last week. McCarron flew in from California today to work the colt, whose fractions were :23 2/5 for the quarter and :46 3/5 for the half.

After the workout, McCarron, who holds the world record with 546 winners in one year (1975), returned to California to ride on this afternoon's card at Hollywood Park. He will return Friday to ride Koluctoo's Jill in the $100,000-added Black-Eyed Susan Stakes.

The field for the Preakness is estimated at 10 starters: Chief's Crown, Eternal Prince, Tank's Prospect, Cutlass Reality, Skip Trial, Sparrowvon, Southern Sultan, I Am The Game, Hajji's Treasure and Roo Art.