They're talking about the physical 'growth' of Tiger Woods from 1996-2008

[dr.chimps]

He's a professional athlete. Sure he works out.

I guess you have never played Golf in your life. It's a challenging sport that needs top edge fitness. 

Hmm. John Daly aside, you need some fitness. I can't remember the last time I walked a course. 

[DK II]

Hmm. John Daly aside, you need some fitness. I can't remember the last time I walked a course. 

true, but then, there are quite some fatasses in golf. 

[medz zeppelin]

He's a professional athlete. Sure he works out.

I guess you have never played Golf in your life. It's a challenging sport that needs top edge fitness. 

Golf? I'm in the gym working.........if you have time for golf your not training enough

[DK II]

Golf? I'm in the gym working.........if you have time for golf your not training enough

Good point, but not really a valuable advice for Mr Woods. 

[Wiggs]

Tiger is a well known gym rat. But he does what he needs to do for him.  Not bodybuilding bullshit. 
In addition, he is part black so his great physique can be attributed to that also.