Broncos defensive end Vonnie Holliday says that an injured knee kept him from signing with a team earlier. Holliday signed with Denver on Saturday. He admitted Sunday that he had his right knee surgically repaired by sports surgeon Dr. James Andrews in late January. "A lot of people don't know this, but I had my knee cleaned up and then I got released by Miami and I found myself in free agency: a 12th-year pro, 33 years old and coming off knee surgery," Holliday told the Associated Press. "So, when I met with the Broncos I had a puffy knee." The Broncos, who eventually signed him to a one-year deal, remained in touch. "I really didn't want to miss training camp," said Holliday. "When you're going through it, you hate it and you dread it. But I missed it because I was used to being in training camp. "And retirement was never an option, not from where I'm at right now. I still have a few years left."