The 6-foot-2 receiver missed all of last season with a torn ACL suffered in August, the latest in a string of injuries.
Philadelphia traded for the pass-catcher in March of 2013 and gave him a one-year extension.
The $1.1 million contract could have been one reason behind his Friday release. It remains possible the Eagles bring Benn back at a lower salary later this offseason.
Philadelphia's receiving corps has been a hot topic this offseason. The team re-signed receivers Riley Cooper and Jeremy Maclin. Later, the much-discussed release of Pro Bowl pick DeSean Jackson took place. The Eagles then added a pair of earlyround receivers in Jordan Matthews (second round) and Josh Huff (third round) in last week's draft, pushing Benn further down the depth chart.