He is ... the most feared quarterback in the NFL.
He holds five MVP awards, the most in NFL history.
He often goes "no huddle", just to irritate the defense into making a dumb mistake.
He holds the record for most seasons with over 4,000 yds passing.
Opponents play "Old Rocky Top" when he enters their stadium, purely out of respect.
He's won the life time achievement award, twice.
He holds the record for the most passing yards in a season: 5,477 (2013).
He once executed the Statue of Liberty play in which he faked a pass, handed-off to a running back, received a lateral pass from that running back, then threw down field to another receiver for a touchdown.
He's been known to throw both right-handed and left-handed in the same game, just to have a little fun with the defense.
His autographed footballs have been traded for small countries in Central America.
He holds the record for most touchdown passes in one season: 55 (2013).
He studies defenses so intently and thinks so hard about how to confound them that sometimes he complains his hair hurts.
Although he has the arm of Perseus, son of Zeus, he looks oddly like a duck. Come to think of it, he kind of dances like one too.
He once threw a football across a crowded TGIF and killed a fly on the wall that was bothering another patron. Interestingly, no one saw the ball fly through the air, and only a few heard a hiss. After killing the fly, the ball landed harmlessly in an empty booth. Afterward, Manning autographed the ball and and gave it to a young paraplegic in the restaurant.
He is fluent in five languages, including one that only he speaks in which the word "Omaha" is a noun, a verb and a conjunction. No opponent has yet deciphered this language, or even this one word.