Casey Martin, the Nike Tour player who rides a golf cart because of a painful circulatory disorder in his right leg, failed to qualify yesterday for next week's U.S. Open championship.

Martin had a morning round of 71 at Sand Ridge Golf Club in Chardon, Ohio, but a triple-bogey 7 on the 401-yard 10th hole and back-nine 41 led to an afternoon round of 76.

"I'm pretty beat," Martin said. "My leg is killing me. The heat was definitely a factor. Riding in a cart was no advantage today. I'm in pain. I laugh at people who think a cart gives me a competitive edge. They should feel what I feel."

Dennis Zinkon of Haines City, Fla., shot a 5-under-par 139 to lead a trio of qualifiers that included Nike Tour player Jason Tyska of Mount Pleasant, Pa., and PGA Tour pro Gabriel Hjertstedt of Ponte Vedra, Fla. Tyska shot a 3-under 141 and Hjertstedt a 142.

In Columbus, Ohio, Chris Smith, a nonwinner in six years on the tour, had the low 36-hole score -- 10-under 134 -- while Lanny Wadkins, Ian Woosnam, Craig Stadler and David Frost failed to qualify.

A total of 27 players -- all pros -- qualified from a starting field of 129 from the Columbus sectional qualifier at The Lakes and Brookside Country Club.

Joining Richmond native Smith was Bill Glasson, who tied for second at the Kemper Open two weeks ago.

It came down to 10 players for the final six spots, with Tim Herron and Keith Clearwater hitting long birdie putts on the first hole of a playoff. Former Masters champion Larry Mize, Bob Gilder, Chris Tidland and Stephen Allan all parred, eliminating Fulton Allem, David Ogrin, Jim Johnson and Steve Gangluff. Those four continued playing to determine the alternates.

In Littleton, Colo., Gary Hallberg of Castle Rock, Colo., and Matt Call of Thornton, Colo., beat out 18 others to qualify for the Open.

Hallberg, a PGA touring professional, shot a 7-under 65 and added a 71 to finish at 136. Call, a junior on the University of Colorado golf team, shot a 69 and a 68 to finish one shot behind Hallberg with 137.

Pat Fry of Fort Collins, Colo., a former University of Wyoming golfer, placed third with a score of 140 in the qualifying round at Columbine Country Club. He will be first alternate.

Brandt Jobe of Castle Rock, a Japan PGA Tour regular who tied for 14th at the 1999 Masters, tied for fourth with Mike Sauer at 141.

In West Palm Beach, Fla., former Boise State all-American David LeBeck qualified with a 4-under-par 140. Other qualifiers were Scott Fawcett of Plano, Tex., and Jeff Street of Tuscaloosa, Ala., at 141, and Alberto Ochoa of McAllen, Tex., at 142.

In Atlanta, Bob Heinz shot an 8-under-par 136 at the East Lake Golf Club to lead four qualifiers. Tim Loustalot shot a 138, while Bryce Molder and Mark Slawter each shot 139s.

The U.S. Open begins June 17 at Pinehurst Resort and Country Club in Pinehurst, N.C.

CAPTION: Bill Glasson, here lining up a putt during the final round of last month's Kemper Open, qualified for 1999 U.S. Open at sectional in Columbus, Ohio.