ALLEN PARK (AP) -- The Detroit Lions are beefing up their defensive line.

One of the worst teams in the NFL on Friday acquired defensive tackle Corey Williams from the Cleveland Browns in a move that also involved a pair of late-round draft picks.

They also agreed to a four-year deal with defensive end Kyle Vanden Bosch after coach Jim Schwartz waited outside Vanden Bosch's Nashville, Tenn., home when free agency began at midnight. The deal reportedly is $26 million with $10 million due in the first year for the 31-year-old defensive end. Agent Tony Agnone did not return messages left by The Associated Press.

A nine-year veteran, Vanden Bosch spent the past five seasons with the Titans, getting all of his 43½ career sacks.

For Williams, Detroit sent a fifth-round pick in April's draft to the Browns in exchange for the tackle and a seventh-round choice. Williams was drafted by Green Bay in 2004 and played his first four seasons with the Packers before being traded to Cleveland for a second-round pick in 2008.

(Copyright ©2010 by The Associated Press. All Rights Reserved.)