Miami coach Cam Cameron said that Porter's knee problems are not believed to be serious, but that Dolphins officials are seeking an assessment from the team's medical staff as a precautionary measure. Since the Dolphins have an off-day Sunday, no announcement is expected before Monday.
"It was something that he noticed during the offseason program," Cameron said after Porter missed the team's Saturday practice. "He was working his way through it. It isn't something that happened since we started practice. He just wanted to get it checked out."
Porter, 30, has been relatively free of knee problems during his eight-year NFL career. The former Pittsburgh Steelers star has missed only six games in his career, and has never been sidelined for more than two contests in a year.
He did wear a brace on his right knee during organized team activities sessions (OTAs) in June, but has not employed it in the early portions of training camp.
Signed to a five-year, $32 million contract just days after the Steelers released him on March 1, Porter should be an excellent complement to Dolphins' star defensive end Jason Taylor in terms of pressuring the quarterback. The pair seems to have melded quickly in camp and the Miami coaches feel their pass rush will be a strength in 2007.
Porter had played his entire career with the Steelers before he was released in a salary cap-related move. The loquacious linebacker, one of the best outside pass rushers in the league from a 3-4 alignment, has 498 tackles, 60 sacks, 18 forced fumbles and seven recoveries in 122 games. A three-time Pro Bowl performer, Porter has at least seven sacks in six of the past seven seasons.
Senior writer Len Pasquarelli covers the NFL for ESPN.com.