Oh man, we're not explicitly stating who helped GSP with his knee in these transcripts. But what I can tell you is that Georges St-Pierre, or GSP as we usually call him, has worked with a ton of professional trainers, therapists, and doctors throughout his career. Firas Zahabi, for instance, is an absolute genius when it comes to MMA, and he's always brought in the best people to help GSP with his conditioning, injuries, and technique. Unfortunately, the specific person who helped with his knee isn't mentioned here. But whoever they are, I bet they're top notch in their field. That's just how it goes in the world of professional MMA.