Former Eagles quarterback Donovan McNabb spoke about the release Friday on his NBC Radio show "Under Center With McNabb and Malone."
“For Chip Kelly coming in, a new coach, a new style, obviously he’s trying to incorporate his discipline, his method of everybody buying into his system," McNabb said.
"And DeSean was just he was different. He was doing the same thing he was doing with Andy [Reid] and Andy kind of sugarcoated it a little bit, covered it up."
McNabb was the Eagles' starter during Jackson's first two seasons in the NFL (2008-09) under Reid.
"[Reid] had a core nucleus of veterans that said, 'Hey DeSean, we’re not doing that,’" McNabb said. "But Chip just said, ‘Hey he’s not into that.’ It’s unfortunate, but he’ll be picked up somewhere.
“But if it happens again somewhere else, then you have to really dig deep into it. For DeSean, who you can talk about gang affiliation and all that, some decisions he’s made over the years is starting to wear on people in the organization.”
Jackson is coming off the best season of his career. He set career highs in receptions (82) and receiving yards (1,332) and tied a career-high with nine touchdown grabs.