Consensus on the web is that he is a very good run blocker for a WR, with some key Eagles' runs helped by him sealing the perimeter. He certainly takes pride in his blocking.
An AI:
A.J. Brown is a very good run blocker for a wide receiver—above average at the position thanks to his elite size, strength, and physical mentality.At 6'1" and 226 lbs, Brown brings lineman-like power and toughness to perimeter and downfield blocks. He's not a "move the pile" guy like an offensive tackle, but among WRs he's reliable at engaging defenders, sustaining blocks, and creating lanes on outside runs, sweeps, or when the Eagles pull guards and ask receivers to wall off the edge.
Key Strengths as a Run BlockerPhysicality and effort: Brown is willing to throw his body around and finish blocks. Eagles fans and analysts have pointed out specific plays where he seals the edge or makes key downfield blocks for Saquon Barkley (e.g., Barkley's long runs where Brown was credited with a crucial block that he himself downplayed as "just doing my job").