Jerry Reese specifically stated that he drafts according to height/weight/speed. Let's disregard the fact he doesn't draft linebackers round one. Brown is 15 lbs lighter than the other top ILBs out there. He's almost like a safety. He's not going to be our first round pick regardless what anyone thinks. Reese was content in having a 6th round pick start at MLB.
Just like TE it's a position he ignores and a position he will continue to ignore. Especially when they're not at the top of the height weight and speed scale.