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The Arizona Republic, Rob Schumacher) MARICOPA COUNTY OUT; MAGS OUT; NO SALES, Associated Press
Kyle Stanley follows through on his tee shot on 5th hole during the first round of the Phoenix Open golf tournament on Thursday, Feb. 2, 2012, in Scottsdale, Ariz.

SCOTTSDALE, Arizona — Jason Dufner finished off a 7-under 64 for a share of the lead with Ryan Palmer after the first round of the Phoenix Open on Friday.

Dufner, a playoff loser last year to Mark Wilson at TPC Scottsdale, birdied two of his five holes in the morning after play was suspended on Thursday because of darkness.

Palmer finished play at dusk on Thursday.

Bo Van Pelt and Spencer Levin joined Webb Simpson at 65.

Forty-two players completed the first round on Friday. For the second straight day, the start of play was delayed an hour because of frost. Last year, frost and frozen greens delayed play nine hours during the week, forcing a Monday finish.