"I reckon I could drive somewhere between 270 to 290m off the tee, on a downhill run I might get to 300!
"If I score anything in the mid to high 80's I'd be really happy with that."
A mental skill he said he brings to his golf is the ability to forget about the previous shot or throw and just move on.
"That's probably the difference between top professional golfers and the others so it's a good skill to have."
Walsh is playing in the tournament for the first time and said it capped off a "crazy" two years.
"I've had some pretty amazing experiences, especially in the last six months," he said.
"This is an amazing place, they've done an amazing job and I can't wait to play some golf, but I've still had a training session in the gym this morning and there's a throwing session tomorrow."
Walsh finishes up in Queenstown then the Olympic bronze medallist focuses on the shot put nationals in Hamilton and into the future.
"I'm in great nick for the world championships in London this year, that's the big goal," he said.
Walsh joins Olympic gold medallist and America's Cup sailor Sir Russell Coutts, New Zealand's most-capped hockey player Ryan Archibald and Pittsburgh Major League baseball player Masumi Kuwata for the ISPS Handa New Zealand Open at Millbrook Resort and The Hills (March 9 - 12).
Also stepping outside their sporting comfort zone will be NZ cricket legends Brendon McCullum and Stephen Fleming, Aussie cricketers Shane Warne, Allan Border and Ricky Ponting, crowd-pleaser Sir Ian Botham, dual rugby and cricket international Jeff Wilson and former All Black Grant Fox.
They're joined by celebrity chef Josh Emett and Australian TV personality and singer Kerri-Anne Kennerley, all playing as part of the tournament's popular and successful Pro-Am format.