PHILADELPHIA — First understand this: I like Doug Pederson. I’ve known him for 23 years. I think he’s a good coach. I’m happy for him and his family that the Jaguars hired him Thursday. He never should have been fired by the Eagles, and I can’t wait to see how he fares in Florida. He’s the NFL’s most endearing nerd. Go get ‘em, kid. But also understand this: I’m astonished that Doug Pederson is back in the NFL as a head coach, entrusted with developing the most hyped quarterback since Dan Marino. Then again, I was astonished the Eagles hired him in 2016, too. The similarities are stunning. Nob…