The Eagles have signed defensive end Darryl Tapp to a three-year contract. Philadelphia acquired Tapp from Seattle on Wednesday in a deal involving fellow defensive end Chris Clemons and a fourth-round pick in next month's NFL Draft. Tapp's contract is a two-year extension tacked on to the one year he had left on his Seattle contract, with $9 million in annual base salaries and a $3 million signing bonus, according to a league source.