Tampa, FL (Sports Network) - The Tampa Bay Buccaneers have signed four of their 2011 NFL Draft selections to contracts, including first-round pick Adrian Clayborn.

Clayborn, a defensive end out of Iowa, was chosen 20th overall. Clayborn started in 37 of 50 games played, including his last 30 consecutive games as a Hawkeye.

He ended with 192 tackles, 19.0 sacks, seven forced fumbles, one fumble recovery and eight passes defensed. In 2010, Clayborn was an All-Big Ten Conference first-team selection.

Tampa Bay also came to terms with defensive end Da'Quan Bowers, linebacker Mason Foster and tight end Daniel Hardy.

Bowers was the club's second-round selection. Bowers' three-year career at Clemson saw him start 30 of 38 games, recording 150 tackles, 19 1/2 sacks, 46 tackles for loss, four passes defensed, one forced fumble, two fumble recoveries and an interception.

07/27 19:03:41 ET