By Jarrod Castillo Ex-Dallas Cowboys assistant coach Kellen Moore could be about to cross one of the NFL’s biggest rivalries. He’s reportedly in talks with the Philadelphia Eagles to be their next offensive coordinator, despite having spent time with their NFC foes in the past. Moore was the offensive coordinator for Dallas in 2022 before moving to the Los Angeles Chargers in 2023, and he’d at one point seen as an offensive coaching prodigy who might eventually take on a head coach role. Now, ESPN reports that he’s being interviewed by Philadelphia for their vacant offensive coordinator positi…