ndy Ponseigo, Navy's left fielder in the spring and all-America middle linebacker in the fall, batted in four runs yesterday as Navy trounced the Colonials, 17-6, at Bishop Field.

So onesided was the game that coaches Joe Duff of Navy and Jim Goss of GW agreed to shorten it to seven innings.

The Midshipmen (19-5-1) scored twice in the first inning off losing pitcher Roger Marquis (0-1) and never were challenged. Leadoff batter Jon Mullican singled and scored on a wild pitch, and Ponseigo drove in Andy Loferski with a long fly to center.

Navy extended its lead to 5-0 in the third. Tony Rodgers walked, stole second, advanced to third on Loferski's single and scored when Marquis threw the ball away on a pickoff attempt. Ponseigo drove in Loferski with a triple and scored when Marquis walked three straight.

George Washington (3-15) made its best bid in the fourth, cutting the lead to 5-2. Gregg Ritchie singled, stole second and, after a walk to Scott Rowland, took third on a fielder's choice and scored on Matt Allen's single. An error by Rodgers at second base allowed the second run in.

The game got out of hand when Frank Van Zant replaced Marquis in the fourth. Van Zant allowed three runs and four hits that inning, as Ponseigo delivered a run-scoring single and Rick Wilson a two-run single. In the fifth, Van Zant gave up nine runs and six hits while getting just one batter out. Bart Rowe's bases-loaded triple made the score 12-2 and Mullican, who began the inning with a walk, tripled across two runs to chase Van Zant.