The bad thing about Wayne Levi leading at the halfway point of the Canadian Open golf championship in Oakville, Ontario, is that the leader must start Sunday's final round early in the afternoon. It will conflict with the telecast of his beloved New York Giants' NFL game in Dallas.

"Well," he said yesterday, presumably in jest, "I've still got another day. Maybe I can arrange for a real early starting time on Sunday."

That, of course, would require him to play a poor third round. And he has given little indication that is in the offing. The only three-time winner on the PGA Tour this season, he has had consecutive rounds of 68 and completed 36 holes at 136, eight under par at the storm-raked Glen Abbey Golf Club.

Second-round play was called moments after Dave Barr three-putted in a pouring rain for bogey-6 on his final hole late yesterday afternoon.

Thunderstorms prevented the resumption of play and 11 players marked their positions on the course and are to return Saturday morning to complete their second rounds. None appeared to have any chance of moving among the leaders.

Bryan Tennyson held second, a stroke off the lead. Not yet a winner in a four-season career, he played in the more calm conditions of the morning and did not make a bogey in a round of 67.

Lancome: In Saint-Nom-La Breteche, France, Colin Montgomerie of Scotland shot a 7-under-par 63 to take a two-stroke lead after two rounds of the Lancome Trophy tournament.

LPGA: In Kent, Wash., Patty Sheehan shot a 7-under 65 in the second round of the Safeco Classic for a one-stroke lead over Sherri Steinhauer, whose 64 was one shot off the course record.

Sheehan, who won the Cellular One-Ping Championship in Portland, Ore., last week, is at 134, 10 under par, on the 6,222-yard Meridian Valley Country Club course. Danielle Ammaccapane, Juli Inkster, Cindy Figg-Currier and Nancy Rubin are tied for third at 140.

Seniors: Violent storms in Grand Rapids, Mich., poured two inches of rain on The Highlands course in less than four hours, postponing the opening round of the Greater Grand Rapids Open.

The Senior Tour event, originally scheduled for 54 holes, was shortened to 36 holes, to be played today and Sunday.