Davis fired a 6-under 64 and Thatcher carded a 5-under 65 on Day 3, which saw many of the players make up for rain-delayed second rounds.
Taking a tumble was defending champion Fredrik Jacobson, who held the lead when play was halted Friday. He stumbled to an even-par 70, falling into a sixth-place tie with Padraig Harrington (65), Matt Kuchar (66), Tim Clark (66), Charley Hoffman (67) and Will Claxton (69).
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