On Saturday, Woods confirmed he was forced to withdraw due to the flu and expressed his disappointment about not being able to continue competing.
"I would like to confirm that I had to withdraw from [The Genesis Invitational] due to illness, which we now know is influenza," Woods posted to X. "I am resting and feeling better. Good luck to the players this weekend. I’m disappointed to not be there and want to thank [Genesis USA] and all the fans for the support."
The Genesis Invitational was Woods’ first official PGA Tour event since the Masters in April, when the 15-time major champion withdrew in the third round after aggravating his plantar fasciitis.
Woods wasn’t just dealing with an illness after returning to the course.
In his first round, where Woods shot a 1-over 72, he experienced back spasms. On the 18th fairway, Woods shanked his approach shot, winding up in the trees.
"Well, my back was spasming the last couple holes, and it was locking up," Woods said, according to ESPN. "I came down, and it didn't move, and I presented [the] hosel first and shanked it."
Woods said Thursday he hopes to play at least one tournament a month.
The Associated Press contributed to this report