The names of the sires of the 2-year-old horses in tonight's $116,000 Potomac Stakes at Freestate, the richest race in Maryland harness history, read like a "who's who" for the sport.

Albatross, Meadow Skipper, Bret Hanover, Big Towner, and Keystone Ore are some of those names. And three of the sport's top trainers--William Haughton, Howard Camden and Archie McNeil--have entries. It's an auspicious way for the track to open its 58-day meeting.

Twenty pacers were entered for the stakes, forcing the race to be split into two $58,000 divisions, to be run as the seventh and ninth races on the card, scheduled for a 7:30 start.

"We were only looking for a $75,000 race," said Freestate President Frank De Francis, "but we got some backing we didn't even count on. Obviously, the money has brought out some of the best 2-year-olds in the nation."

Among the leading horses in the first division are two Haughton entries, Fozzie Bear and Better Heather, and Keystone Trick, a 2:00.4 winner in his last race, at Brandywine.

Better Heather, to be driven by Haughton's son, Tommy, has the best lifetime mark in the field, 1:58.3.