NFL

The 6 Best NFL Passing Seasons Since 2000

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5. Peyton Manning, Indianapolis Colts (2004)

Pass NEP: 231.10

Surprisingly enough for a list containing three quarterbacks of at least 37 years of age, Peyton Manning is the only retired player of the bunch. So, it's only right that it feels like it's been forever since Manning's seventh season with the Indianapolis Colts -- one of the best of his career.

At 28 years old, in the prime of his career, Manning threw for 4,557 yards and 49 touchdowns with a completion percentage of 67.6%. He earned a career-best touchdown percentage of 9.9% while averaging 9.2 adjusted yards per attempt, which was also the best mark of his career.

Manning's Colts disappointed in the playoffs, however, winning their Wild Card matchup over the Denver Broncos before losing to the Patriots in the divisional round.