World number eight Rory McIlroy in red and black when he finished sixth in the WGC Workday Championship
Tiger Woods expressed gratitude after seeing several male and female golfers show their support on Sunday.
The 15-time main winner, 45, is Recovery from leg injuries Suffered in a car accident last Tuesday.
“It’s hard to explain how touching it was today when I turned on the TV and saw all the red shirts,” said Woods tweeted.
“For every golfer and every fan, you really help me through this difficult time.”
McIlroy, Tommy Fleetwood, Patrick Reed and Tony Finau were among those who wore red and black when they competed in the WGC Workday Championship in Florida won the American Collin Morikawa.
Phil Mickelson did the same thing as Annika Sorenstam did at a PGA Tour Champions event in Arizona LPGAs Gainbridge Championship.
“I think it’s just a gesture for us to let him know we think of him and put down roots for him,” said McIlroy, 31.
“Things are looking a little better today than they were on Tuesday, but he still has a lot to do.
“If it weren’t for Tiger Woods, I just think the tour and golf game in general would be in a worse place. He meant a lot to us; he still means a lot to us.”
Morikawa’s win at The Concession in Bradenton brought him to Woods as the only player to win both major and WGC titles before turning 25.
“Tiger means everything to me,” said Morikawa, 24. “I don’t think we’re thanking enough, so I want to thank Tiger.”
Woods is facing a long recovery period, but it was reports to be “in good spirits” after being rushed to a new Los Angeles hospital for treatment on Friday.
He was already recovering from his fifth back operation and was hoping to compete in the Masters in April.
