Buffalo Bills tight end Charles Clay left practice early on Tuesday with a nagging right knee injury. He was hindered all last season in Miami with a nagging knee injury as well. Clay insisted he's fine but he said the same thing last year too. "I'm fine," Clay said. "It was just something that they wanted to look out for me a little bit. It was something that started nagging, so they decided it would be best to pull me out … I don't want to get much into all of that. You can ask [Coach] Rex [Ryan]. I don't want to get too much into injury talk.