DAVIE, Fla. -- New Miami Dolphins linebacker Joey Porter was up walking soon after undergoing arthroscopic knee surgery Tuesday for the third time in two years.

Teammates expect him to rejoin the lineup soon.

Porter is expected to be out at least two weeks. The first of Miami's four exhibition games is Saturday against Jacksonville.

Dr. James Andrews performed the surgery in Birmingham, Ala. Porter has been out since Friday because of the injury to his right knee, which began bothering him during the offseason.

Joey has been fighting through this thing all of camp so far," defensive tackle Vonnie Holliday said. "I think they wanted to go ahead and clear this up and get it over with. I don't think this will be a problem long-term. I think it was just a cleanup job."

Porter received a guaranteed $20 million in March to sign with Miami after spending his first eight NFL seasons with the Pittsburgh Steelers. He has missed only six games in his career.