Although he's been playing in the NFL for 13 years, Kansas City Chiefs quarterback Alex Smith remains the archetype of dual-threat passers.
The two-time Pro Bowl selection has completed 76 percent of his throws this season for the undefeated Chiefs, generating 1,067 yards, eight touchdowns with zero interceptions, 89 rushing yards and one score.
Ever since Smith entered the NFL with the San Francisco 49ers, his mobility has been a big factor. He's rushed for 2,067 yards and 14 touchdowns.
During his time in the NFL, Smith has seen the league evolve into one where read option and Pistol plays were regarded as a novelty to become more of the norm with mobile quarterbacks like Texans rookie standout Deshaun Watson.