"The Buffalo Bills today reached a contract agreement with first round draft choice Marcell Dareus. Dareus, a defensive end from the University of Alabama, was the third overall pick in the NFL draft. His contract is worth $20.4 million for four years, according to a league source. It is fully guaranteed, as are the contracts of most of the first-round draft choices this year.

The Bills will have an option to retain him for a fifth year, according to league rules.

Dareus, a 6-3, 323-pounder, will step in immediately as a starter on the Bills' three-man defensive line. "