Ronald Singletary ran a sparkling 49.3-second anchor leg to help Renton Central of New Jersey capture the championship division mile relay in a meet record time of 3:20.8 at the 10th annual Marc Jenkins East Coast relays last night at Spingarn Stadium.

Team scores were not kept but had they been the Tornadoes, who broke four records in winning the Class I championship last year, surely would have won again.

"We came a long way and we'd like to win something," said Trenton Central Coach Holland Moore. "We don't have the great team we had last year but I'm happy with any victory we get."

Moore had to be pleased with Singletary. The senior also anchored the 400 and 880 relay teams to victory.

In the mile, he inherited a four-step lead on Spingarn's Willie Holbrook and quickly stretched it to 10 yards. He glanced back only once as he cruised home to snap by almost three seconds the record Fairmont Heights set last year.

The only other record broken last night was by another out-of-area team, Menchville, Va.

Menchville, Springarn, Ballou, H.D. Woodson and Central were all within breathing distance of one another when the anchor runners grabbed their batons for the final two laps of the two-mile relay. Then Troy Sessoms summoned a last bit of strength to hold off Spingarn's sensational sophomore, Sandy Chapman, who came from fourth place, 15 yards back, and lost by a step. Chapman was timed in 1:56 flat.

Chapman ran a 4:25 mile to anchor the Green Wave's only victory, in the distance medley relay.

Ballou's Noel Cyrus played cat and mouse with O'Connell's Bob Donnely before pulling away to win by six yards in the sprint medley relay. Donnely, who was timed in 1:58 for his two laps, came from fifth place to take the lead from Cyrus with 300 yards to go. But Cyrus clung to Donnely's heels before turning it on in the stretch.

"I'm glad he took me when he did," said Cyrus. "I saw another shadow on the track when he went by me, but I knew I was strong and I caught him where I planned to."