Rambo is the biggest name among the trio. The safety recorded eight starts in 15 games in 2015 with the Bills. He recorded 62 tackles, one sack, one interception, and two forced fumbles. His best game in 2015 came against the NY Jets on Thursday Night Football. Rambo recorded two forced fumbles against New York, one which resulted in a Duke Williams touchdown, and he sealed the game with an interception of Ryan Fitzpatrick. While Rambo may not be considered as a starter at the safety position, he's solid depth.
Powell also seems like a bit of a surprise when it comes to not being tendered. The linebacker missed the entire 2015 season with an ACL injury, but before suffering the injury Powell had impressed Rex Ryan. The head coach talked about how smart Powell was and how quickly he was picking up the defense last season. Just recently, GM Doug Whaley said that Buffalo had a "good feel" for what Powell can do and that they team was working on a deal with him "as we speak."
Buffalo's decision against tendering Charles does not come as a surprise. Although he's flashed at times on the field in his career, the defensive tackle lacked consistency. Charles only saw 228 snaps in 2015 with the Bills.null