Amy Mickelson was diagnosed last week with the disease and received a message of support on Friday from Darren Clarke, who lost his wife to breast cancer in 2006.
"I had a pair, so I figured I'd do that for her today. I thought it would be a good gesture," Daly said of his trousers. "I know Phil very well and I know Amy. I've known them for a long time -- we've played the Tour together. She's a great lady. She has always been a sweetheart to everybody."
(Photo by Warren Little/Getty Images)