Grady Mateen, the 6-foot-11 center-forward who left Georgetown suddenly late last season, announced yesterday he would attend Ohio State University this fall.

Earlier this week, Mateen said he had narrowed his choices to Ohio State and the University of Maryland. "I'm definitely excited," he said. "I've got the chance to start over, somewhere new and fresh."

Although Mateen said earlier in the week he had been recruited by Maryland, Terrapins Coach Lefty Driesell said yesterday he did not offer the player a scholarship. "He wanted to come here," Driesell said. "We didn't recruit him. If we had given him a scholarship, we would only have had one left, so we decided against it."

When Mateen, a premedical major, was recruited two years ago out of Central Hower High School in Akron, Ohio, his final choice came down to Georgetown and the Buckeyes. He left the Hoyas this past March just as they were preparing for the Big East tournament, citing a lack of playing time.

Mateen will be ineligible next season under NCAA transfer rules but will have two years of eligibility remaining beginning in 1987.

Among other things, Mateen said he chose the Buckeyes because he was familiar with Coach Gary Williams, who was head coach at Boston College before he moved to Ohio State this spring. Mateen is Williams' first recruit for the Buckeyes.

"He's played with a national program, he's practiced against experienced players," Williams said. "When he gains a year's maturity and gets familiar with our style, hopefully he can step right in and play."

That will come as good news to Mateen, who left Georgetown because he said he didn't "see any future for myself."

Although he was generally first off the bench and was sixth on the team in minutes played, his floor time decreased as the year went on. In his last three Big East games, he played a total of 11 minutes. He averaged 4.2 points and 3.1 rebounds in 27 games for the season.