"This was one of those 15-percent games," Mark Adzick said.

More detail, please.

"You know how it goes," he continued. "Twenty-five percent of the time, you have your best stuff. Sixty-five, you have OK stuff. And 15, you just don't have anything, really."

Especially in the eggheaded Inter-Ac League, they know that's a total of 105 percent.

However, because he was tired, and had just survived some late-game trauma, and had been forced to wait in frustration an extra 55 minutes before getting a chance to start working, Adzick will be forgiven for miscrunching the numbers.

Mark Adzick is human, the Daily News learned yesterday.

Yes, the 6-4, 170-pound lefthander last year earned first-team All-City honors as a sophomore. And 5 months have already passed since he made an oral commitment to a Division I baseball program (Wake Forest). And he is again making impressive outings this season.

But low-hit games are not always possible. And sometimes victory is achieved in way-hairy fashion.

Penn Charter outlasted visiting Chestnut Hill Academy, 6-5, as Adzick recorded eight apiece of hits allowed and strikeouts and needed a sensational, all-or-nothing diving catch in medium right-center by sophomore rightfielder Ryan Wenger to close things out.

Cory Broderick, who had singled, was on the move with two out and likely would have scored had Wenger not made the big-boy play.

Just before that, Brett DiFelice had capped a pesky at-bat (many foul balls) by firing a groundball single to center. And losing pitcher Anthony Cafagna, a junior righthander, had launched a two-run homer to right-center.

When the game concluded, Ad-zick was only mildly pleased.

"In the bullpen I could tell the changeup wasn't moving the way I wanted it to," he said. "And I couldn't control the fastball in terms of inside-outside. Everything was moving into the middle. And they were hitting the ball nice... At least my curve was working.

"I have to thank my teammates. Because of the run support, I didn't need to have my best stuff to get the win."

The delay happened because the base umpire was involved in an accident en route to the game, plate ump Warren Gillis said. An emergency call went out and veteran Bruce Martin arrived in time for a 4:40 start. The teams had agreed to postpone the game at 4:45.

"I probably wasn't warmed up enough in the first inning," Ad-zick said. "First it was, 'I want this ump to get here!' Then it was, 'I don't need to pitch now.' So, I guess the delay was messing with my head a little."

Adzick walked the leadoff batter, Mark Justice, and the Blue Devils scored twice on RBI by Cafagna (single) and Anthony Giovinazzo (sacrifice fly). Their third-inning run came on Mike Manzione's double and Mike Mattei's single.

PC countered with two apiece in the first and fifth and one each in the third and fourth. Freshman Rob Amaro went 3-for-3 with two RBI, Sean Rust went 2-for-3 with an RBI and two runs scored and Wenger drove home what turned out to be the very necessary sixth run with a high-velocity double to left-center.

When PC coach Rick Mellor was asked whether he considered yanking Adzick in the high-tension seventh, he quipped, "Nah, he would have strangled me... He just got a fastball up and [Cafagna] clocked it. He still looked OK to me."

Said Adzick, smiling: "Coach knows. I don't like coming out in the middle of an inning."

Adzick, who chose Wake Forest over Virginia because of his overall feel for the program, is neck-deep in baseball, and especially pitching. He has personal coaches for hurling (Mike Manning) and strength conditioning (Julie Victor) and he credits ex-Phillies pitcher Tyler Green, an assistant at Germantown Academy, for recently enabling him to see the big picture.

Green had a talk with Mark's father, Scott, at a PC-GA game (don't tell anyone; these schools are the archest of rivals) and dad passed on the gist.

"My first few games this season, I was losing by 1-0, 3-1... we just weren't getting runs on the board," Adzick said. "I started thinking I had to pitch one-hitters, even perfect games.

"[Green] really explained it well to my dad. You have to pitch within yourself. If you go out there trying to pitch one-hitters or perfect games, it's not going to happen because you're thinking about it too much. I'm trying to follow that advice: Stay within myself."

It's not every high school athlete who wants to talk psychology even closer to 7 p.m.