Marino was a one trick pony who was so selfish about his stats that he fucked his team. Many teams let the coke head throw between the 20s all day...They knew he was never going to hand it off. He made it to the Superbowl his rookie year and never again...
That might be a little harsh..... Marino was the precursor to today's NFL. His career, the 80s and early 90s, took place during the ground and pound era, it wasn't until the last 5 years before any of his season records were even being sniffed, for years no one came close and now it's nothing to throw for 5000 yards.
He had no dominant tail back, Elway was considered a loser until he got Terell Davis. I think he had Sammie Smith and Bernie Parmelle. Jimmy Johnson tried to help him with Cecil Collins and Kareem Abdul Jabra.
He didn't win a Superbowl but during his peak no one from the AFC did.