The Bills Mafia is teaming up to support star tight end Dawson Knox -- putting their wallets together to honor his brother, FIU football player Luke Knox, after his tragic death ... by donating nearly $100k to a charity that is close to their family.
P.U.N.T. -- a pediatric cancer organization affiliated with the Knox brothers -- has been receiving donations of $16.88, representing their jersey numbers, after news of Luke's passing broke on Thursday.
Dawson has been affiliated with the org.