By Tom Beattie The Philadelphia Eagles are facing a tricky situation following the retirement of Jason Kelce. The NFL legend was a crucial cog in the team’s “tush push”, or “Brotherly Push”, strategy which has been very successful for them. However, with Kelce leaving, it’s unclear if they will continue to use this play. This particular move involves the quarterback being pushed over the line by his teammates to score a touchdown or gain a first down. It’s a move head coach Nick Sirianni has “a lot of faith in.” But with Kelce’s retirement, it’s uncertain what the team’s approach will be. Quar…