Embed from Getty Images   MVP: Patrick Mahomes, QB, Kansas City Chiefs This was a season-long race between the 23-year-old first-year starter with the cannon arm and the 40-year-old walk-in Hall of Famer having arguably his best year. But while Drew Brees faded down the stretch, uncharacteristically averaging just 206 passing yards over his final five games, Mahomes didn’t let up. Mahomes threw multiple touchdowns in every game this year…