Where does the Browns link come from?
The tie comes from Dawg Pound Daily, which described C.J. McCollum in July 2018 as "a huge Browns fan." That is the outlet's wording, not his, and it is the only support for the link. It stands as a background tie to the Cleveland Browns, not a fandom he has stated himself.
Does it line up with where he is from?
It fits his geography. McCollum was born in Canton, Ohio, on September 19, 1991, and went to GlenOak High School there before playing college ball at Lehigh from 2009 to 2013. Canton is in Ohio, the same state as Cleveland, though nothing in his background says how far apart the two are or ties the Browns to his upbringing in any other way.
Questions people ask
What team did C.J. McCollum root for growing up?
Nothing in his background says which team he followed as a kid; the only link is Dawg Pound Daily's July 2018 description of him as "a huge Browns fan."
What is C.J. McCollum's favorite NFL team?
He hasn't named one himself, but the Cleveland Browns are the NFL team tied to him through that 2018 Dawg Pound Daily report.
What teams does C.J. McCollum root for?
The only team linked to him is the Cleveland Browns, and that is a reported background tie rather than something he has said.