Well, funny you ask. For many in the Eagles' locker room, their jersey numbers become part of their everyday lives, it becomes their identities. For others? It's just the way it worked out.
Here's Zach Ertz:
"In high school, I was No. 5. When I was recruited by Stanford my head coach, David Shaw, texted me and said, 'What number do you want?' I didn't care. He said that I reminded him a lot of Todd Heap (former Stanford and NFL tight end) so I was given No. 86 and it's kind of stuck with me since then. When I was drafted here (in 2014) a tight end named Evan Moore had No. 86, but he was released shortly after the draft and they gave me No. 86. I'm going to be here for my entire career and I'm going to be 86 my entire time in the NFL. That's my goal."
Check out the sights from Opening Night at Super Bowl LII.

The Philadelphia Eagles players walk out on stage during Super Bowl Opening Night.

RB LeGarrette Blount takes a selfie.

CB Jalen Mills takes a selfie while on stage at Super Bowl Opening Night.

DE Vinny Curry takes a selfie.

QB Nick Foles during his session with the media.
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DE Brandon Graham smiles during his time with the media.
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Head coach Doug Pederson.
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WR Alshon Jeffery.
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DE Vinny Curry.

QB Nick Foles.

RB LeGarrette Blount speaks to the media.

A look at RB Corey Clement through the lens of a camera.

OT Jason Peters speaks to the media.

Offensive coordinator Frank Reich.

CB Ronald Darby has a laugh during an interview.

QB Nick Foles.
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WR Torrey Smith.

RB LeGarrette Blount surrounded by media during Opening Night.

C Jason Kelce.

Chairman and CEO Jeffrey Lurie.
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Chairman and CEO Jeffrey Lurie.
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LB Jordan Hicks.

TE Zach Ertz shares a laugh with NFL Network analyst Michael Irvin.

DT and Minnesota native Beau Allen.
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OT Lane Johnson.

TE Brent Celek.

DT Fletcher Cox answers a question fron NFL Network analyst Deion Sanders.

Defensive coordinator Jim Schwartz.
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Head coach Doug Pederson.