Tiger Woods' PGA Tour comeback ended prematurely after he pulled out of the Genesis Invitational in California during his second round.
The 48-year-old is still adapting to ankle fusion surgery, having undergone treatment in April last year after withdrawing from the Masters during the third round and he did not compete again until the Hero World Challenge in December.
The 15-time major champion, tournament host this week, finished Thursday’s opening round at the Riviera Country Club on one-over par.
But the American could not back that up a day later as he withdrew after six holes due to illness, rather than injury.
Woods started in fine form, producing a birdie on the first, but back-to-back bogeys arrived from the fourth and he called it a day after a third par on the sixth left him one over for his round.
Woods was driven back to the locker room by a rules official.
He had suffered from a back spasm towards the end of his first round, shanking his second shot on the 18th from the fairway over into the trees on the right, eventually sinking a two-putt bogey to make a five.
Rob McNamara, executive vice president of TGR Ventures, told PGATour.com Woods had started feeling flu-like symptoms on Thursday night.
"He had a little bit of a fever and was better during the warm-up, but then when he got out there and was walking and playing, he started feeling dizzy," McNamara said.
"Ultimately the doctors are saying he's got some - potentially some type of flu and that he was dehydrated. He's been treated with an IV bag and he's doing much, much better and he'll be released on his own here soon."
Following Friday's play, it was also announced that Jordan Spieth was disqualified for signing for an incorrect scorecard.
In a statement on X, the PGA Tour said: "Jordan Spieth has been disqualified from The Genesis Invitational for signing for an incorrect scorecard.
"Spieth signed for a 3 and made a 4 on No. 4."
American Patrick Cantlay takes a five-shot lead into the weekend at 13-under-par, ahead of Jason Day, Luke List and Mackenzie Hughes.
Meanwhile, Rory McIlroy recorded three birdies and an eagle in a flawless five-under-par second round as he fought to beat the cut.
The Northern Irishman had struggled for a three-over-par 74 on day one but ended the second day on two-under, well inside the the cut mark of +1. His round of 66 saw him eagle the 11th, with three birdies also in his round.
Seamus Power will be around for the weekend after his 68 ensured he finished even par. The Waterford man carded four birdies; the only blemish saw him drop a shot on 15.
