In the two years in which the Governor's Cup has been contested, the 15th jump in the final race of the spring-long steeplechase series has been decisive.

The handsome trophy, which will be presented to Jack Griswold in ceremonies Sunday at the historic William Paca House in Annapolis, is emblematic of Maryland's point-to-point steeplechase championship. It is awarded to the rider with the most points at the end of the six-race series.

The 15th fence in the Voss Memorial at the Elkridge-Harford meeting in Monkton proved Billy Myers' downfall this year. Leading the series after winning at Marlborough with Frost Time and at Potomac with Donna Donovan, Frost Time "just jumped too soon" and fell with the 16-year-old Upper Marlboro rider.

The fall enabled Griswold to win with Coney Island and, coupled with his victory at Goshen with Too Far Gone, plus two second places, gave the 35-year-old Butler, Md., stock-broker 16 points to 14 for Myers.

Myers will once again be in the background at the award ceremonies that will proceed a hunt breakfast at 1:30 p.m. at Paca House. The trophy is sponsored by Historic Annapolis, Inc. Associates. Information may be obtained by calling 530-5453.