Having still not played in a game in 2006, Porter was officially suspended/inactivated without pay for four games (the maximum allowable) by Coach Shell on October 15 for "conduct detrimental to the team" after he made disparaging and disrespectful remarks during a regular team practice. When the suspension was announced the NFL Players Association filed a grievance on Porter's behalf, and the Raiders reduced the suspension to two games on the 25th and he was allowed to return to practice. He dressed for and played in his first game of 2006 on October 29 – a Raiders home win over the Pittsburgh Steelers – during which he recorded one catch for 19 yards.