San Diego Phil Mickelson is weaker and 10 pounds lighter from a bout with food poisoning, but still is tied for the lead going into the third round of the Buick Invitational.
Mickelson had an 8-under 64 at Torrey Pines to pull into a share of the 36-hole lead with Davis Love III.
Mickelson was at 132 and hopeful a better physical condition was ahead. "As the week has gone on, I've slowly felt better and better," he said.
Love joined him at 12-under 132. First-round leader Brent Geiberger was another stroke back after a 69, while K.J. Choi had a 65 and was at 134. Tiger Woods wound up with a 67, just five strokes behind.
Mickelson spent seven hours in a hospital on Monday, the next two days trying to recover, and the last two playing slow, steady and solid.
"I've played at a very slow pace and haven't really had a problem," Mickelson said. "I don't know if there's a benefit, but there's an old saying, 'Beware of the ailing golfer.'''