Peter Senior birdied the 18th hole Saturday to share the the third Golf

roundupround lead with Greg Norman in the Australian Masters golf championship.Senior shot a 4-under-par 69 on the 6,955-yard, par-73, Huntingdale course to equal fellow Australian Norman's 11-under-par 208 total.

Senior has carded rounds of 68-71-69 and six-time winner and defending champion Norman has shot 70-67-71.

"I'll go out now and do a little work on my game and I'll give him a run for his money tomorrow," Senior said. "I like playing with Greg. The only thing I've got to concentrate on is my rhythm. I get a little hurried some of the time, but if I can keep that under control everything will go fine."

Senior, who uses an unwieldy-looking long-shafted putter, got off to a sizzling start on the front nine, holing birdie putts at the fourth, fifth, seventh and eighth holes.

Norman said he was playing as well as he had for almost a year.

"I played extremely well today and my game's getting better as the week goes by," Norman said. "As long as I can keep hitting the ball the way I am now I'm going to be there tomorrow afternoon."

Australians Jeff Woodland , Rodger Davis and Peter O'Malley were three shots off the pace at 211.

The trio was one shot ahead of Australian Mike Clayton and New Zealander Frank Nobilo .

David DeLong led the U.S. challenge at 214 after a 73 in the third round..

At La Jolla, Calif., Steve Pate rolled in a 25-foot birdie putt on the 17th hole Saturday to take a one-shot lead after three rounds at the $1 million Shearson Lehman Brothers Open, a tournament he won in 1988.

Pate's round of 67 put him at 17-under for the tournament, one stroke ahead of Brad Faxon and Corey Pavin. Pate began the day tied for first place with defending champion Dan Forsman.

After trimming three strokes from his score with a birdie and an eagle on the first two holes, Pate bogeyed the fourth hole and settled into a string of five pars, including two par-5 holes that are traditionally generous birdie holes for the PGA.

"It was kind of a weird round," Pate said. "I didn't birdy any of the par 5's and I didn't really hit any that close (to the hole)."

"On the positive side, I drove well and hit most of the greens and I never really got into any trouble," Pate said.

Pate shot 67 and 65 in the first two rounds for a three-day score of 199, two shots better than his three-day total in 1988 when he beat Jay Haas by one stroke.

After three rounds in 1988, Faxon led by one stroke over Pate.

Pate knocked a 7-iron second shot to the green on the par-4 17th hole and then sank a 25-foot putt to jump ahead of Faxon and Pavin, Pate's old UCLA teammate. Faxon turned in a solid 5-under 65 for the round and maintained his hold on second place.

Pavin birdied seven holes, including a 60-foot wedge shot on the par-3 11th hole and long putts on the third and eighth greens. But he muffed a sand wedge shot on the par-5 nine hole to cost him a shot at a birdie and share of the lead.

"I was a little mentally tired . . . and I had to tell myself to bear down and play well," Pavin said.

At Naples, Fla., Dale Douglass fired a 1-under-par 71 to hold on to a one-shot lead over defending champion Lee Trevino after the second round of the $450,000 Aetna Challenge, the third stop on the 1991 PGA Seniors Tour.

Douglass had gone into the day with a four-shot lead over eight golfers after an impressive 67 Friday in winds gusting over 40 mph. The winds calmed Saturday.

"The weather was better today, but I didn't make as many putts," Douglass said. "I missed two or three opportunities for birdies on the par 5s."

Douglass wound up the day with a 6-under-par 138. Trevino, golf's leading money winner last year who is still looking for his first win in 1991, managed a 4-under-par 68 for a 5-under-par 139.

"I'm fortunate to be 5-under. I made some key putts for par," Trevino said. "Dale is capable of shooting real low. You never see him in much trouble. He'll be tough to beat."

Tied two shots back at 140 were Simon Hobday with a 67, Jimmy Powell with a 68 and J.C. Snead with a 69 over the par 72, 6,682-yard Vineyards Golf and Country Club course.

Terry Dill fired a 70 and Harold Henning had a 69 and go into Sunday's final round three strokes back at 141. Gary Player, winner at Miami two weeks ago, fashioned a 67 and was in a five-way tie at 142.

Bob Charles, a winner last week at Tampa and tied for second going into the second round, carded a 72 and found himself in a three-way tie at 1-under-par 143 with Chi Chi Rodriguez and Dave Hill .