His worst "full" season is 44 REC/612 yards.
His worst season is 37 REC/578 yards. I'm not sure why injuries wouldn't matter -- they do.
His best seasons are also very similar to his worst ones. He has one huge outlier, whoopee.
No one is saying Lee Evans is not an NFL wide-out, the point that I am making is that he is not one who is worth keying double coverage on, and, in fact, teams do not for the most part. Pittsburgh did, and they lost, bad.