I remember this quote from Jeff Brohm: "We love the addition of Tyler. Anytime you get a big, tall, athletic edge rusher that has played a lot of football, it's a big piece. I think he wants to go somewhere and basically play that position and try to play that position solely if he can. I think he was moved around a little bit."
After going through spring practice, he either didn't feel like he would be able to showcase his NFL talents at Louisville, or as others have mentioned, maybe there was an issue with NIL not coming through as promised.