Its pretty simple really. Whenever millions are at stake, perhaps billions at least in Tigers case, athletes are always trying to gain an edge. Lots of people on this forum seem to really live in a fairy tale land when it comes to the harsh realities of what these guys are willing to do. I know people who wouldn't smoke a cigarette but tried HGH. Honestly, I have seen amazing results from witnessing what that drug will do to somebody. HGH has known health benefits and if used properly, can do wonderful things.
With that being said I have no idea if Tiger has used. However I would not be surprised and if I had to gamble on whether he did or did not use I would say he did, but as most of you said he was a better player than anyone else before he got "ripped" during his beginning years. It sure does work wonders on injuries though.