Maryland's top contenders for the upcoming Triple Crown races are expected to emerge from Saturday's sixth and richest running of the $100,000-added Federico Tesio Stakes at Pimlico.

Broad Brush, winner of the faster-run division of the General George Stakes at Pimlico last week, is expected to be the favorite in the Tesio along with two horses from New York, Point Of America and Fast Step. Broad Brush will be ridden by Vince Bracciale.

Also expected to draw support is Miracle Wood, winner of the Delaware Valley Handicap in his last start and the leading money winner in the 11-horse field. The gelded son of Baederwood has won six races and earned $194,764. He will run as an entry with the speedy Swallow.

Another with strong credentials is Double Feint, a son of Spectacular Bid, trained by Leroy Jolley.

Double Feint has trailed in his only two stakes efforts run over muddy tracks. But a fast track today could make him formidable.

Completing the field for the 1 1/16-mile race are the Dennis Heimer-trained pair of Lil Tyler and Lil Glenn, Trial Flight, Riomundo, Fork Union Cadet, Fobby Forbes and Big Plop.

Jockey Anthony Nunez persevered with Ascool when the colt found himself in close quarters and went on to post a neck victory over Believe It All in a driving finish today in the feature at Pimlico. Silent Dynamite, the favorite of the crowd of 6,441, held well for third, a head farther back.

Ascool paid $10.40 in running the 1 1/16 miles in 1:45 2/5 over a muddy track. The 1-3 exacta returned $40.