The world number three Phil Mickelson is two shots clear after firing a six-under-par 66 in the second round of the WGC-CA Championship at Doral in Florida.
He leads by two strokes from Nick Watney, who carded a bogey-free 67 with another American Kenny Perry and the British teenager Rory McIlroy tied for third, three off the pace.
Tiger Woods, playing his first strokeplay event after his eight-month layoff for knee surgery, returned a 70 for 141.
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The world number one says he's feeling a lot better than he did at the WGC-Accenture Match Play Championship in Arizona two weeks ago.
