[Giants]

I suspect the back-up is Doug Pederson who backed up Favre in Green Bay for several years in the 90s and won the Super Bowl with Philly in 2017 (?). 

(Ah, I see "Giants" beat me to it unless he is refering to a similarly named player with the spelling Peterson.)

All credit to Leftcoast.  Misspellings are automatic disqualifiers.

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Hope this one hasn't been asked before:

In August, the Mariners retired Ichiro Suzuki's jersey #51.

What is the highest MLB jersey number ever retired for a former player?

Randy Johnson?

[Giants]

I suspect the back-up is Doug Pederson who backed up Favre in Green Bay for several years in the 90s and won the Super Bowl with Philly in 2017 (?). 

(Ah, I see "Giants" beat me to it unless he is refering to a similarly named player with the spelling Peterson.)

All credit to Leftcoast.  Misspellings are automatic disqualifiers.

---

Hope this one hasn't been asked before:

In August, the Mariners retired Ichiro Suzuki's jersey #51.

What is the highest MLB jersey number ever retired for a former player?

Randy Johnson?