Linebacker Joey Porter agreed to a three-year contract Friday with the Cardinals after making the Washington Redskins his second visit. ?It is exciting on many levels,? coach Ken Whisenhunt said. ?Two areas that come to mind are his productivity on the field, (because) getting 26? sacks over the last two years is pretty impressive, especially considering last year with not even playing a full season. Also the mentality he brings, it?s something we have made great progress with as a team. Having another veteran player, who has had great success in this league, to contribute to that will only help us in an area defensively where we want to improve.? Porter had nine sacks last season with Miami before the Dolphins cut him. He is expected to fill the starting spot held by departing free agent Chike Okeafor and gives the Cards a needed pass-rush threat.