Porter missed the past two games because he had symptoms similar to ones he experienced after having a seizure in August. Porter practiced on a limited basis last Wednesday, but he suffered a setback. He will be monitored through the week to determine whether he can play Sunday.
Chris Harris has done a terrific job as Porter’s replacement in the starting lineup.
In other AFC West news:
Oakland defensive tackle Richard Seymour (ankle) did not practice Wednesday. Kicker Sebastian Janikowski (groin), linebacker Rolando McClain (toe) and center Stefen Wisniewski (ankle) were all limited as the team prepares to host Tampa Bay on Sunday.