Manning is off to a record-breaking start to the season with 16 touchdowns in four games, good enough for the all-time record to start a season. His seven touchdowns in Week 1 against the Baltimore Ravens are also tied for the single-game high mark in NFL history.
Manning also has a great chance of eclipsing the single-season mark for most touchdowns, set by New England Patriots quarterback Tom Brady (50).
All of this becomes even more impressive when you consider Manning's career almost came to an early end after several neck surgeries that were thought to be a reason behind his loss of arm strength.
After last season, and four games into this one, Manning's arm strength is just fine and he's burning defenses as much as he ever has without incident at the ripe old age of 37.
The Broncos quarterback owns a ton of passing records and is in the top three all-time in major categories such as touchdowns, completions and yards. Adding to those stats, Manning has won an astounding four Most Valuable Player awards and is on pace to earn a fifth this season.
So, clearly the numbers are there for Manning in the regular season and nobody has ever made playing the quarterback position look easier, but his lackluster playoff record leaves him a bit short when putting his career into perspective.
The future Hall of Famer has compiled a depressing 9-11 record in the playoffs with just one Super Bowl win to show for his efforts, which stands as the one thing holding him back from being the greatest ever to play at his position.
Regardless of what Manning does during the regular season, all that matters is how well he performs in the playoffs. Even if he breaks every record in the book during the next 12 games, the only thing people will truly remember is how he finished.
And there is no excuse for any type of struggling with the Broncos in the playoffs.
This is easily the best team Manning has ever had around him on both sides of the ball and he has more than enough personnel to deliver a Super Bowl victory to Denver's elite squad.
If he can get the job done and finish his career strong, Manning will have enough records and rings to help stamp himself as the greatest of all time. If he can't win the big one this season, Manning will leave room for debate and it will certainly rage on as to who the best QB of all time is.