Dudes on here who played organized football will be able to give you a more informed answer, but performance enhancing drugs are RAMPANT in the NFL.
More telling than the size of these guys....is the amount of injuries that have happened the past 4-5 years. Football has always been a violent sport. They are actively preventing headhunting and dirty play yet I can't recall as many injuries occurring in the past as they have in recent years.
Now, here is where an ex football player will know better than me. For football related strength....these Dorian Yates physiques aren't necessary and in fact can hinder pro athletes. Football players , especially Linebackers, used to built like amateur wrestlers..because some of the same movements(and muscles) are required for both sports...
There was a famous clip of NY Giant Brandon Jacobs steamrolling one of these supermuscular defensive players Laron Landry who plays for Washington .
Laron looks like a superhero but that didn't prevent him from THIS
