Mark Williams Has Hot Hand : Bowling: He leads 24-man field in match play that now becomes serious. Only five advance.

That nice-guy, hand-tapping, gimme-some-skin friendliness among the bowlers tapered off Thursday in the AC/Delco PBA tournament at Gable House Bowl in Torrance.

The 18-game preliminaries were over and the 24 surviving pros from an original field of 160 got down to the serious business of match play.

Leading the way into the head-to-head competition was Mark Williams of Beaumont, Tex., rated one of the best match bowlers on the tour.

After averaging 227 to top the field in the preliminaries, Williams continued his hot hand by winning six matches out of eight to move 80 pins ahead at the 26-game mark.

Defending champion Randy Pedersen and four other Southern Californians are still in the hunt. The others are Larry Stephens, Mike Taylor, Mark Baker and Jim Tilton.

Money champion Mike Aulby survived the cut to 24 but other favorites Pete Weber, Mark Roth and Amleto Monacelli didn’t.

Monacelli exited the tournament in an overtime drama. He actually tied for 24th, then lost a strike-studded 299-246 rolloff for the spot to Tony Westlake.

The 24 semifinalists have 16 more matches today and tonight to decide the five finalists for Saturday’s title rolloff.

In match-play bowling, opponents are “out for blood” in pursuit of match wins, according to Larry Lichstein, PBA player services director and himself a former champion on the tournament tour. “There is a bonus of 30 points added to pin total on each victory.”

Lichstein said it isn’t uncommon for a bowler to get psyched out with the pressure on in a close match, especially against a seasoned pro.

Bowling Notes

The highest scoring matches in PBA history were perfect. At Denver in 1981, Tom Baker and Pete Weber tied at 300-300. Each was awarded 15 bonus points. The same point share went to Purvis Granger and Norm Duke for their 300-300 match at Las Vegas in 1987. . . . The highest losing score in a PBA match was rolled by Mark Roth--298.

Amleto Monacelli, 1989 PBA player of the year, is a chip off the old block. His father, Rodolfo, was South American champion in the 1970’s. Amleto and younger brother Rudy, also a touring pro, have no problem finding a place to bowl in their native Barquisimeto, Venezuela. The family owns a 16-lane center on the second story of a commercial building owned by their father and uncles.

Anthony E. Incaudo, a nonpro from El Toro who averages only 124 in league, won top prize of $1,000 in the pretournament pro-am. Given a free strike in the third, sixth and ninth frames of each game, Incaudo scored 168-287-179--634. His pro partners totaled 681. Other nonpros collecting included: 2. Herman Ferguson, Hawthorne, $500; 3. Harry Scribner, Simi Valley, $400; 4. Eric Shimp, Norwalk, $300, and 5. James Sylvester, Yorba Linda, $200.