Plus, the Eagles head coach talks Doug Pederson and facing the guy who used to have his job. Eagles’ head coach Nick Sirianni spoke to reporters on Friday, and talked a bit about their developmental program and how it helps not just young guys, but players who weren’t there for training camp, like Trey Sermon. He also talked about facing Doug Pederson, but wouldn’t comment on their plans for the 53rd roster spot with Britain Covey out of call-ups from the practice squad. Here’s what the head coach had to say: On player development and Trey Sermon Sirianni announced that…