After losing linebacker Ray Lewis and center Matt Birk to retirement, the Ravens' roster underwent significant changes throughout the 2013 offseason. Free agent linebacker Paul Kruger signed with the Cleveland Browns, linebacker Dannell Ellerbe signed with the Miami Dolphins, cornerback Cary Williams signed with the Philadelphia Eagles, and safety Ed Reed signed with the Houston Texans. Additionally, safety Bernard Pollard was released due to salary cap reasons and later signed with the Tennessee Titans. Wide receiver Anquan Boldin was traded to the San Francisco 49ers for a sixth-round draft pick. The Ravens made some offseason additions as well, signing defensive linemen Chris Canty and Marcus Spears as well as signing key free agent linebacker Elvis Dumervil and safety Michael Huff. As well as drafting first round pick Safety Matt Elam, second round pick Linebacker Arthur Brown, third round pick Defensive Tackle Brandon Williams, and fourth round pick "hybrid" Fullback Kyle Juszczyk among others. Unfortunately during training camp the Ravens lost another key player, tight-end Dennis Pitta for the entire season (who was primed for an even greater 2013 season). During a routine drill, he suffered a dislocated/fractured hip after colliding with another teammate (James Ihedigbo) at the back of the end zone. In response, during August, they re-signed wide receiver Brandon Stokley, whom they drafted in 1999, and signed former Colts and Tampa Bay Buccaneers tight end, Dallas Clark.