The 54-year-old American told Golf Channel the cancer was discovered during an appointment related to kidney stones. While it was caught early, he may need further surgery if it returns, he added.

The 54-year-old American told Golf Channel the cancer was discovered during an appointment related to kidney stones.

"(The doctor said) it doesn't look like any stones are in there. But unfortunately, you have bladder cancer," Daly said.

"After I did the CT (scan) I was fixing to sip on my Diet Coke I got from McDonald’s and he said, 'Don't drink anything. We have to get you back in here and get this cancer out of you'."

Daly underwent surgery to remove the cancer but said there was an 85 percent chance it could return, which would require more surgery.

John Daly putts during the opening round of the Sanford International, where he carded a two under 68. PHOTO: Getty Images.

"He said there's an 85 percent chance it comes back,” Daly said. “So, I've got to go back and see him in three months. They will probably have to cut it out again. It's probably going to come back, and then another three months that you don't know. You just don't know.

“Luckily for me they caught it early, but bladder cancer is something that I don't know all the details. But it doesn't look like it may go away. We will just see what happens. Maybe there's a miracle."

“Unfortunately, it's a cancer that keeps coming back. But I'm going to listen to them, and I'm going to try and quit smoking. If it comes back, it comes back." – John Daly.

Daly, who won the 1991 US PGA Championship and 1995 Open Championship and is a five-time PGA Tour winner, has been struggling with back pain, which combined with the kidney stones, has limited his PGA Tour Champions starts. However, he is in the field for the Sanford International where he opened with a two under 68, to have a share of 11th place.

"I'm cutting way, way back on the Diet Coke and counting minutes before I can have a cigarette," Daly told Golf Channel. "I'm trying to quit smoking. The doctors aren't saying it's too late.

“Unfortunately, it's a cancer that keeps coming back. But I'm going to listen to them, and I'm going to try and quit smoking. If it comes back, it comes back. Six months to a year, if it doesn't go away, I'm going to live my life. I'm gonna have some fun.

"Well you know what, I always tell people I've lived one hell of a life. No matter what happens, I'm not scared to die or anything.

"It would have been nice to play the last seven or eight or 13 years of my career a little more healthy. But hey, I'm still working, I'm still living life, I'm still doing the things I need to do. ... I can accept the challenge. I'm not scared of that. I just want my kids to be OK and everyone else in my family."