Philadelphia Eagles defensive coordinator Jim Johnson has received a four-year contract extension, the team announced Thursday. "As I've said many times, Jim Johnson is the best in the business at what he does," said head coach Andy Reid. "His defensive units continue to produce at a very high level as he puts a lot of pressure on opposing offenses." Under Johnson, the Eagles' defense has ranked among the best in the league for the past five years. "I'm very happy to stay with Andy Reid and the Philadelphia Eagles. I love the city of Philadelphia," said Johnson. "We've had a great run here and we want to keep it going. We're focused on getting back to the Super Bowl and winning it." The defending NFC champion Eagles, who lost to New England in Super Bowl XXXIX, have appeared in the last four conference title games.