By Alek Arend Interest is picking up in Pro Bowl defensive tackle Fletcher Cox. Three teams in particular are seeking out a trade for the Eagles defensive lineman, per a report. According to ESPN’s Jordan Schultz, the Eagles are receiving interest in Fletcher Cox from the Buffalo Bills, Pittsburgh Steelers and Los Angeles Chargers. There’s one major obstacle, though. Trading Cox would result in a $40 million dead cap charge for the Eagles. That means teams trying to acquire the Pro Bowl defensive tackle will have to give up a substantial haul. From the sound of it, the Bills, Chargers and Stee…