PHILADELPHIA -- With the Carson Wentz saga taking up most of the oxygen in the Philadelphia Eagles' office, the coaching staff has become something of an afterthought. But it's a pretty big deal. First-time head coach Nick Sirianni, 39, has assembled a generally young group with some boom or bust potential, adding risk and intrigue to his mission of replacing Super Bowl winning coach Doug Pederson and getting a flailing Eagles team that finished 4-11-1 last season back on track. Here are the primary coordinators/position coaches, followed by some analysis. Jonathan Gannon (Age: 37), defensive coordinator Shane Steichen (35), offensive coordinator