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Russell Knox

Hunter Mahan hits his tee shot on the 18th hole during the first round of the AT&T Pebble Beach National Pro-Am at Pebble Beach Golf Links on February 7, 2013 in Pebble Beach, California. (Ezra Shaw/Getty Images)

Mahan, Knox Share Lead After 1st Round At Pebble Beach

The rain stayed away Thursday and Hunter Mahan took advantage of gorgeous conditions for a 6-under 66 that gave him a share of the lead to par with Russell Knox in the Pebble Beach National Pro-Am.