Originally Posted by name goes here
2 years would be enough for defense, his striking would still be his main weapon. 2 years would be too short for a normal athlete, but GSP has shown how a good athlete can pick up a lot quickly. Its not like all the good mma stars have amazing training backgrounds - many do but not all.
You can't make a generalization about the sheer amount of time it would take Floyd to make the transition. He's a good athlete at boxing, but boxing is merely a single aspect of mixed martial arts. It takes more than 2 years of training to be good at BJJ, it takes more than 2 years to become a good wrestler.
Even if he trained 2 years to learn the basics, he'd still get his ass handed to him on the ground and even standing by fighters whom have simply been training MMA longer.
Your statement about "good mma stars" not all having amazing training backgrounds is far too vague. What constitutes a good mma star? I think in order to make it into the larger/more popular organizations such as UFC, Strikeforce, EliteXC, etc, you need to have an impeccable training regimend.
You don't see too many fighters in the UFC that have 0 MMA bouts under their belts. They're tested fighters. I'm not trying to sound like a fanboy here, but Floyd Mayweather would have to earn his way into organizations such as EliteXC/UFC by getting experience in the smaller ones, such as King of the Cage, where I think he'd still be getting tooled by much more experienced fighters.