Quarles, 23, was originally signed by the Baltimore Ravens as a rookie free agent out of Wake Forest on May 11, 2012. The 6-foot-3, 212-pounder was released by Baltimore on Aug. 31, 2012. In 50 career games at Wake Forest, he totaled 239 tackles, two interceptions, six passes defensed, two forced fumbles and 1 fumble recovery.
Silvestro, 23, originally joined the Patriots a rookie free agent defensive lineman from Rutgers in 2011. The 6-foot-3, 260-pounder, spent the majority of his rookie season on the New England practice squad. He was signed to the 53-man roster prior to the Patriots game vs. Miami last season and played in a reserve role, finishing with two total tackles. Silvestro returned to the practice squad before being signed to the 53-man roster the day before the Super Bowl. He was active but did not play in the game. Silvestro converted to tight end in the offseason. He was released by the Patriots at the end of training camp this year and was signed to the practice squad.