Between December 1, 2011 and December 1, 2021, the Kansas City Chiefs have the best record by an AFC West team, with a record of 103-57.

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who has the best afc west record the past 10 years
ChiefsBroncosChargersRaiders103-5790-7077-8362-98
TEAMGPRECW%WLTTDPTSPPGOPP PTSOPP PPG1DWN3DWN%4DWN%
Kansas City ChiefsKansas City Chiefs160103-57.6441035704564,03225.23,36221.03,34940.855.1
Denver BroncosDenver Broncos16090-70.563907004323,79623.73,45421.63,29438.252.9
Los Angeles ChargersLos Angeles Chargers16077-83.481778304343,75823.53,63422.73,43943.253.1
Las Vegas RaidersLas Vegas Raiders16062-98.388629803703,33620.94,32327.03,05038.148.8