The expected Prince George's-Montgomery County matchup for the Maryland State AA baseball championship will have to wait at least another year.

Eleanor Roosevelt and Springbrook, the top-seeded teams, endured their worst fielding and hitting games of the year yesterday and were eliminated in semifinal games at Maryland's Shipley Field.

Little-regarded Chesapeake of Anne Arundel County took advantage of two walks and an error to score three times in the fifth inning and had strong pitching from Steve Marson in upsetting previously unbeaten Roosevelt, 4-1, in the first game of the doubleheader.

In the other game, David Gilly, who had struck out in his first three at bats, led off the eighth inning of the scheduled seven-inning contest with a long home run over the 350-foot sign in right-center and Chuck Horsey won his 14th game of the season as Dundalk of Baltimore County shocked Springbrook, 3-2.

Dundalk (17-2) and Chesapeake (14-7), each in the state final for the first time, will play for the title Friday at Shipley Field at 5 p.m.

"This was a poor defensive game for us," said Roosevelt Coach Marvin Whittaker. "We threw the ball away a couple of times and Theron (Todd) got in trouble with some walks. We got some hits, but not at the right time. Their pitcher just threw heat and said, 'Come on and hit it.' "

Roosevelt (18-1) threatened to send Chesapeake ace Marson to the dugout early, with five base runners in the first two innings. But the Raiders managed only one run, in the second inning, for a 1-0 lead.

These were opportunities they would regret later, for Marson (8-3) grew stronger and yielded only two more hits in the final five innings.

Chesapeake tied the game, 1-1, in the third inning on a pair of walks and a throwing error. The Cougars took control in the fifth inning, sending nine batters to the plate and scoring three runs.

Jim Burnett, who was three for three and played well at shortstop, led off the inning with a single, took second on a wild pitch, third on an infield single by Bernie Williams and scored the winning run on an error on the Williams hit. With two outs, Ike Austin and Larry Rzepkowski had RBI singles.

Like Roosevelt, Springbrook (17-2) got off to a quick start. Blue Devil pitcher Tyler Wolfram (8-1) helped his cause with a two-run homer for a 2-0 first-inning lead.

And also, like their neighboring county rivals, Springbrook would get only two hits the rest of the way off junk ball pitcher Horsey (14-1). But Dundalk, which had only three hits, managed a 2-2 tie. The Owls parlayed a single, two walks and a passed ball on a strikeout, which resulted in a base runner, into a run in the fourth.

George Wenig drew the fifth walk off Wolfram, moved to second on a sacrifice, took third on a ground out and scored on a wild pitch to tie the game at 2-2 in the last inning.

Gilly then atoned for his three strikeouts with his homer.