One ticket holder emptied the double-triple pool of $57,015 yesterday at Laurel but had to endure a few unsteady minutes in the process.

The bettor, who was not identified, had the only fifth-race double-triple combination of 2-5-1. First Down, No. 2, put away No. 1 Asoleada in midstretch and seemed headed for certain victory until No. 5 Gets started ripping into her lead in the final furlong.

They hit the wire side by side, followed by Asoleada, and it took several minutes before the placing judges announced First Down the winner. The photo showed First Down ahead by about an inch.

It was a big inch for three horseplayers who would have made $19,005 apiece had Gets gotten up for the victory. To Be Bet and Not Seen

Laurel and off-track Pimlico will take bets on Sunday's $1 million Hollywood Gold Cup even though the race will not be shown at either track.

The tracks tried the unorthodox system of wagering for the first time on the March 4 Santa Anita Handicap and handled $102,324. Fans can wager on the race at Laurel or Pimlico Sunday and watch it on tape delay during the "Maryland Racing" program beginning at 11 p.m. on WFTY-TV-50. The Maryland payoffs also will be available on telephone hotlines.

The Gold Cup, a 1 1/4-mile race at Hollywood Park, features horse of the year Sunday Silence, stablemate Ruhlmann, Pimlico Special winner Criminal Type and Opening Verse. Sunday Silence is the 126-pound highweight. . . .

Jockey Jorge Duarte suffered a bruised shoulder yesterday when Noble Gent fell after the finish of the second race. Duarte, 32, was treated at Greater Laurel-Beltsville Hospital and released. . . .

I'm Jama is one of Maryland's winningest thoroughbreds in 1990, and yesterday he showed himself versatile as well. The 3-year-old made his second start on turf and beat $35,000 claimers by more than three lengths for his sixth victory in 11 tries this year.