Kelly was not willing to rework Mathis’ contract, as the previous Eagles regime had. Most players would use their agent to handle such a task. Mathis directly texted Kelly with a YouTube video of Engelbert Humperdink singing, “Please release me, let me go. …’’
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“There were many things that Chip had done that showed me he wasn’t building a championship team. Two of the main issues that concerned me were: 1. A never-evolving, vanilla offense that forced our own defense to play higher than normal play counts. 2. His impatience with certain personality types even when they were blue-chip talents. The Broncos team I was on would have eaten Chip alive. I don’t think he could have handled the plethora of large personalities.”
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The Eagles extended an offer but Mathis and his agent Drew Rosenhaus decided to table negotiations until after the season so he could focus on football.
After that 2014 season, Roseman was stripped of some authority while Kelly was given full control of football operations. When Rosenhaus reached out to resume negotiations, Kelly said he had no knowledge of previous negotiations.
"Since I wasn’t going to be paid what I was offered and I wouldn’t simply be given better incentives to play for a coach who wasn’t building a winning team, I decided I wanted out of Philadelphia. I hope Chip learns from his experiences in Philadelphia and grows as a coach. Maybe he’ll find some constructive criticism from this."