[perezfan]

Just to play "Devil's Advocate"....

Is it possible the jersey could've shrunk via multiple washings and drying, after the photo of Matty was taken? Also it looks like the sleeves are not fully elongated in the modern photo. I see some bunching up that (if pulled or straightened) should elongate the sleeves.

That said, it does seem quite a stretch, given the circumstantial evidence they present. How can they attribute this jersey specifically to Matty (vs. some other random Giants player?) Apparently there is no name embroidered in the tail, or other positive identifier. Unless I missed some key piece of evidence in Heritage's description, the attribution to Matty is weak at best.