Maryland lacrosse Coach Dino Mattessich yesterday announced his resignation effective Aug. 1. The eighth-ranked Terrapins (6-4) have games remaining with Massachusetts and Towson State and two victories should get Maryland into the eight-team NCAA tournament.

Mattessich, who said he wanted to pursue business opportunities, was graduated from Maryland in 1974 after starring at midfield. He replaced highly successful Buddy Beardmore as coach in 1981. He said the decision to resign was his alone and he was under no pressure.

"The administration has been fantastic, a coach couldn't ask for a better boss than (Athletic Director) Dick Dull," Mattessich said. "I had been thinking about it even before the season began. I actually decided on it after the North Carolina game (Maryland's upset of the defending champions). That's an indication that this season had nothing to do with it. I wanted to be the first to tell my players. I didn't want them to think they're responsible in any way."

Dull said, "Dino talked to me in the middle of last week and said he was 90 percent sure he wanted to leave. I asked him to think it over for a few days. He did, but he still felt that way. We had a very good relationship. I think this decision could make the team play even harder because it's his last month."

Maryland has been a NCAA quarterfinalist the past two seasons and had a 24-14 record.

"I'm not tired," Mattessich said. " . . . It's a good time in my life for a change. I've been coaching for a long time and I don't think I ever want to get back into it."

Dull said while Mattessich would have input on the choice of a successor. "It's a search committee of one. Coach Beardmore might be interested in the job and any of our assistant coaches would be the kind of person we'd want to take a look at. I hope to name someone by July."