A slight man of about 60, with gray hair and glasses, walked up to a betting window at Pimlico for today's ninth race and plunked down a shopping bag containing $55,000. He bet $500 to win, 4500 to place and $54,000 to show on Victory Song.

The unidentified bettor had served notice he was coming to play, and the track security chief, William Ramsey, provided him an escort. Ramsey had met the man at Laurel the day he pushed $80,000 to show on Dave's Friend and that noted sprinter won. He had advised the fellow to notify him "any time he was coming to bet so that there would be no tieup of the machines and less inclination of his being held up."

Victory Song, the highweight of the nine-horse field for the ninth race, was sent to the front by jockey Mario Pino.Once in front, he toyed with his opposition.

Straightened for home, Victory Song drew away easily, and the plunger received $58,400 for his investment, or a $3,400 profit. Victory Song paid $3.80, $3 and $2.10 across the board. The bettor took his money in cash. There was a minus pool exceeding $6,000 for the race.

In the $25,000-added Primer Stakes, Gay Christopher led throughout and scored by two lengths over Lejoli, who easily led favored Buck Dance for the place.

Gay Christopher ran the five furlongs in :59 1/5 and paid $10.80 to win under jockey John Adams for owner Soo Han Chin.

Jockey Gerald Grenier, slated to ride on today's card at Pimlico, was hit by a train early in the morning while walking near Rte. 16 in Charles Town, W.Va. Taken to Winchester Memorial Hospital, he was listed in stable condition.