I'll probably watch the Olympics but I'm not sure golf will be one of the events I watch.
Spieth cited "health concerns" as his reason for withdrawing, though he said the Zika virus was only part of it.
"All of a sudden you get to this point and there is a responsibiity on you to grow the game, and I get that, but at the same time that's not the reason I got into golf".
Spieth goes on to say that playing in the 2020 Tokyo Olympics is now one of his top priorities. International Golf Federation President Peter Dawson said Monday he thought there was an overreaction to Zika and that none of the workers on the new golf course have been affected.
McIlroy and Spieth join Shane Lowry, Graeme McDowell, Jason Day, Dustin Johnson, Hideki Matsuyama, Marc Leishman, Adam Scott, Branden Grace, Louis Oosthuizen and Charl Schwartzel and Fiji's Vijay Singh in not travelling to Brazil to participate. In the end, the two-time major victor said he chose what he thought was best for his future in pulling out of the Olympics.
"This year I just had to try to weigh a risk that doesn't present itself every year, and just at the time I had to make the decision, I just felt this was the right move for me".
Rory McIlroy says golf must improve its drug-testing regime as he could "get away with" doping as it stands.
Spieth labelled his decision to withdraw from the Olympics as the hardest of his life and feels it will "loom" over him throughout the Games.
"I told him he had to do what was best for himself", Fowler added after giving a lesson to schoolchildren at Troon as part of the HSBC Hour, which offers an hour of free golf to children and their families at nearly 300 golf clubs across the UK. "I'm an ambassador for the PGA Junior League, I do some stuff for the First Tee in the States, and I feel like I've used my success in golf in a very positive way in the community".
"I'll probably watch the Olympics, but I'm not sure golf will be one of the events I watch".
"I think golf in the Olympics is great for golf".
McIlroy, who rates the four Majors as more important, also questioned whether golf was doing enough to justify its Olympic status in terms of drug-testing.
It didn't draw a smile so much as a sigh from the 27-year-old, who replied: "I haven't heard that, no". I'm strictly health concerns as a whole.
"I bounced back with birdie on 15".
"No, that's personal. I can't". He said he would carry the decision with him through the Olympics and for a while. "If there are Olympic Games in Johannesburg would guys pull out because of malaria?"
Masters champion Danny Willett will be going for the gold.
"I think the opportunity was obviously there to be an Olympian and that to me was something that I think was going to be pretty cool".