I think you'd have to be very new to MMA or just not like MMA enough to watch all that often to not actually know who Thomson is. Which since the sport is growing is not out of the question. But Pettis sounds like a an idiot saying no one knows who Thomson is, plain and simple. I don't think being a noob or too casual for anything other then UFC once in a while is all that good of a reason to act like that is not the case.
I like MMA less because of this forum