Dan Marino is both proud and a bit surprised that his single-season passing yardage record has stood the formidable tests of time and rules changes.
He doesn't expect it to last much longer.
The former Miami Dolphins QB set the record of 5,084 yards in 1984, but if the league's quarterbacks continue at their current pace this season, New England's Tom Brady, New Orleans' Drew Brees, Green Bay's Aaron Rodgers, Dallas' Tony Romo and Carolina rookie Cam Newton all would surpass his total, and San Diego's Philip Rivers and Detroit's Matthew Stafford would be knocking on the door.
One QB having a great season would be understandable. But after 27 years, why the sudden outburst?
Marino, now a CBS Sports studio analyst, says the game has changed. The rules limit contact by defensive players and severely penalize many of the bone-jarring hits that made the safeties and linebackers of his era famous. Tight ends and running backs are more versatile, the no-huddle offense is more common, teams throw more than ever and receivers are bigger, stronger and faster.
With all those factors, Marino concedes that it's probably just a matter of time before one of the league's longest-standing major offensive records falls.
"I don't want anybody to break it," the Hall-of-Fame quarterback said, laughing. "There's a lot of guys that are going to have a chance to break it, I'm sure."
Brady appears to have the best chance. Through five games, he has passed for 1,874 yards -- a pace for nearly 6,000 yards.
That success is in large part due to his connection with Wes Welker, who has a league-high 740 yards receiving and is on pace to gain 2,368 yards.
That would shatter Jerry Rice's record of 1,848 yards set in 1995.
It's not just the top players who are producing eye-popping numbers. Through five weeks, minus Monday night's Chicago-Detroit game, the NFL is producing 489.7 combined yards passing per game. That's well ahead of the full season record of 443.1 set just last season.
"I've never seen anything like it," Marino said. "I think it's amazing."
Teams are also completing passes at a near-record rate of almost 61 percent.
So much for the lockout slowing down offenses.
"It's a passing league," Colts receiver Pierre Garcon, who has 271 yards and four touchdowns receiving the past two weeks, said. "The fans want to see that. The NFL wants to see that -- more passes, more points scoring, more excitement. It's just turned into a pass happy league."
The most shocking aspect of this year's increase is that it doesn't appear to be attached to a specific rule change.
The league saw an immediate spike in passing stats after the 1978 rule change outlawing contact beyond five yards downfield. There were additional spikes in 1996 and 2004 after the NFL pledged stricter enforcement of the rule.
Quaterbacks have passed for 4,500-yards in a year 22 times in NFL history. Fourteen of those great seasons have come since the start of the 2004 season.
"I think over the last four or five years or whatever it is, people are figuring out how to take advantage of the rules," San Diego coach Norv Turner said. "It's a big deal. I tell our guys, the rules have been set up for offensive football and for scoring. The big thing defensively I think now is you have to get stops. You have to find a way to get turnovers and get stops, because teams are going to get yards, particularly teams with quarterbacks of that caliber that have put that time into the passing game."
The most recent changes to affect the passing game are the 2009 rule that protects quarterbacks from being tackled below the knees and bans on blows to the head, strictly enforced last year, that were designed to limit injuries to defenseless receivers.
Brees said the emphasis on protecting receivers helps the passing game.
"Guys aren't worried about catching balls and having their head taken off because of penalties and a fine," Brees said. "Guys have more of a chance to catch it because they're hit in the body rather than the head."
The sheer number of passing attempts give today's quarterbacks a chance at Marino's record, too. Marino threw 564 passes in his record season; when Brees came within 15 yards of the record in 2009, he threw 635 times.
Teams have combined to throw an all-time high of 70 times a game this season -- meaning 70 passing attempts between the two clubs playing. In 1984, they threw a combined 64 passes per game.
Marino said today's quarterbacks enter the league more prepared because the high school and college games are more sophisticated. Newton and Cincinnati's Andy Dalton have been impressive in their rookie seasons as starters.
The versatility of today's players also is a factor. San Diego's leader in receptions is running back Mike Tolbert, a 5-foot-9, 243-pound wrecking ball who looks like an old-school blocking fullback rather than a guy with 28 catches in five games.
"It's probably as far along as it's ever been with schematics and scheming," Rivers said. "And I think, too, now there's a lot of teams, and I know we're one of them, in what would normally be a run personnel, they all catch it. You're seeing a lot of teams do a lot more out of the formations. There definitely are different matchups that favor the offense."
Turner isn't sure the big numbers will last.
"Some of those guys play in cold weather," he said. "When you get in your division games and you get later in the year and you're fighting for playoff spots, things get a little more conservative."