The American University baseball team, plagued by inconsistency all season, surprised Georgetown yesterday by playing flawlessly and putting together a three-run rally in the seventh inning to win, 7-6, at Reeves Field.

Scott Hurwitz led off the seventh with a sharp single to center. After two grounders advanced Hurwitz to third base, outfielder Jim Jeffries legged out an infield single to score Hurwitz and cut the Eagle deficit to 5-4.

Mike Spring followed with a single to left, and when Georgetown left fielder Mike Saguto bobbled the ball for an error, Jeffries took third and Spring wound up on second.

The Eagles (8-15) took a 6-5 lead when Jim Vershbow lined to single to center scoring Jeffries and Spring.

American added an insurance run in the eighth when Hurwitz doubled off the center-field fence, scoring Neal Schultz, who had walked.

Starting pitcher John Hampford survived early control problems to win his third game, with ninth-inning relief help from Frank Keenan.

Hampford, a 6-foot-2 senior right-hander, totaled 45 pitches in the first three innings before settling down and retiring 10 straight.

"I really didn't have my good stuff in the early going, and I have to credit our defense because those guys played a hell of a game," Hampford said. c

Eagle freshman Greg Wells pounded losing pitcher Tom Bass' first pitch of the game, a fast ball, deep over the center-field fence.

The Irish connection of Chris O'Meara and Bill O'Leary gave Georgetown a second-inning run without the benefit of a hit. O'Meara walked and stole second and third on successive pitches.These were the first of eight Georgetown thefts. O'Leary then hit a sacrifice fly to right.