Webb Simpson has urged golf's ruling bodies not to introduce a ban on long putters.
The Royal and Ancient Golf Club and the United States Golf Association are currently discussing whether to ban putters that can be anchored to the body.
Simpson won the US Open using his preferred belly putter, which was also used by 2011 PGA champion Keegan Bradley and this season's Open victor Ernie Els.
Ahead of this week's PGA Grand Slam of Golf in Bermuda, Simpson admitted he fears a ban on long putters is imminent, and that he has already started practising with a traditional flat stick.
"I'm friends with a lot of the R&A guys and the USGA guys. It's nothing personal and I know they are trying to do it for the betterment of the game," Simpson said. "But I don't think it's a good decision.
"If the USGA bans it, I think it's going to be a whole other ballgame if the PGA Tour bans it. It's going to be tough if they do ban it.
"Last year there was no one in the top 20 of strokes gained category that anchored a putter. So the argument of, 'It's an advantage', you have to throw that out. There's a bunch of arguments going around but I haven't heard a good one yet."
Simpson switched to a belly putter in 2004, and he added: "I just became a more consistent putter. I don't get hot quite as much, I don't get cold quite as much.
"But I'm not worried about it. I'm ready, and if they do it for next year, I'll be ready."
