Joey Porter missed his second straight practice Saturday, and Dolphins coach Cam Cameron said the team is having the linebacker's right knee evaluated. "We will be able to tell you more on Monday," Cameron said. "We don't think that it is anything significant, but we want to make sure." Porter, entering his ninth season, wore a brace on the knee during the last weekend of organized team activity practices June 8-10, and he didn't practice on the final day.