PITTSBURGH (AP) — Mark Calcavecchia shot a 6-under 64 on Saturday for a share of the third-round lead with Joe Daley in the Senior Players Championship.

Calcavecchia, the Montreal Championship winner last week, matched Daley at 12-under 198 at Fox Chapel. Daley had a 68.

Second-round leader Fred Couples, the winner last year at Westchester Country Club in Harrison, N.Y., and Tom Lehman were a stroke back. Couples had a 70, and Lehman shot a 66. Lehman won the Regions Traditions in his last start.

The tournament is the third of the five Champions Tour majors.

Calcavecchia's bogey-free round matched the best of the day. After winning last week, he has progressively improved his score each day, opening with a 69 and shooting a 65 on Friday.

Jeff Freeman was 10 under after a 70, Fred Funk was another stroke back after a 64, and Bill Glasson was 8 under after a 68. Freeman needed only 11 putts on a back nine that featured four birdies and an eagle on 15. Funk eagled the par-5 third hole and had a stretch of five birdies over seven holes on the back nine.

Kenny Perry had a hole-in-one on the par-3 17th and finish with a 67 to join Michael Allen (70), Roger Chapman (66) and Olin Browne (69) at 6 under. Perry used a 6-iron at the 185-yard hole.

After two consecutive days of temperatures in the mid-90s, the third round was played in slightly more bearable conditions.

Daley appeared as if he might wilt — not because of the weather but because of the pressure of playing in the first group with a pair of major tournament champions in Couples and Lehman.

Daley bogeyed Nos. 3 and 4 after Lehman and Couples each had already birdied No. 2. But Daley recovered with a birdie on No. 5 and avoided mistakes the rest of the way, while Couples struggled with back problems.

Couples first had spasms while hitting out of the rough on the second hole. Lehman said he had empathy for Couples because of the noticeable amount of pain he was in.

Still, Couples endured through the even-par round that kept him playing in the final group Sunday. Couples is attempting to join Arnold Palmer as the only player to successfully defend the title.

Palmer, from nearby Latrobe, won the tournament in 1984 and '85. He was on hand Saturday for the announcement of a youth golf endowment in his father's name.