Rob and Rex Ryan might have been mixed up at birth

The Buffalo Bills hired Rex Ryan as their head coach in January - or at least, that's what they'd like you to believe.

In a lengthy piece written for the Buffalo News, Tim Graham reveals that Rex and his twin brother, New Orleans Saints defensive coordinator Rob Ryan, might have been mixed up at birth:

The twins' birth certificates show Rex was born five minutes ahead of Rob. But there is no guarantee which one truly is which.

The Bills' new coach might actually be Rob. The Saints' defensive coordinator might actually be Rex.

There's a good chance Buddy and Doris mixed them up. On multiple occasions.

For a while, Rex and Rob were identified as Baby A and Baby B in the hospital.

"The nurse would take one away when I was done feeding and bring me the other one," Doris said, "and I'd swear, 'I think I just fed this baby.'"

As long as they were switched an even number of times. If not …

"I would've had a better name," Rex said. "We've laughed about it before. I probably really am Rob, and he's Rex. Isn't that funny, though? Who knows?"

Not that it bothered them. Rex and Rob were so close that they actually shared the same wallet and car key into their 20s.

"We were at the same place anyway," Rex said. "So if we're going out to eat, we don't need two wallets. We lived out of that.

"The first time I really carried my own wallet was the day I got married."

Graham's piece includes several other anecdotes about the twins and is well worth your time.