Matt was always hanging around Fogwells when his dad was alive, learned how to adjust to his blindness while there, did his homework there - he had to have gotten at least a little close to the other boxers besides his dad, especially if someone there knows him well enough to let him keep using the gym after hours.

So give me that. The other boxers mourning Battlin' Jack alongside Matt, and leaving their doors open for him even when he had to go to the orphanage. Maybe they're suspicious of Stick (or they never meet Stick and are really concerned for Matt when he suddenly stops hanging out with them so much and showing up with mysterious injuries). What did they think of Battlin' Jack's son finally making it into college, then law school, then graduating? Has Matt every represented/been a lawyer for any of these guys who watched him grow up?

Bonus for them knowing about Matt's fighting skills (even if they don't understand how he's doing it), and maybe figuring out he's Daredevil. Or even just them somehow finding out he's Daredevil without knowing, beforehand.

Double bonus if they're the reason why Matt never found Roscoe Sweeney - many of them still had to work for the guy, and they obfuscated Matt's search in an effort to protect him (or maybe they managed to talk Matt out of doing anything).

Triple bonus if Matt breaking and entering into Fogwells and screwing a cute girl in the ring ever comes up, somehow.

Just give me a bunch of avuncular old boxers who remember Matt back was when he was little Matty, Jack's son. :D