Chiefs Safety Tyrann Mathieu Ruled Out of Rest of Game Vs. Bills – NBC Chicago
Kansas City's Tyrann Mathieu out after opening-drive collision with Buffalo's Josh Allen - The Boston Globe
Alex Smith suffers concussion after returning to Chiefs game
Chiefs vs Bills: The Good, the Bad, and the Averted Heartbreak
Tyrann Mathieu injury: Chiefs star ruled out of game with concussion
Chiefs S Tyrann Mathieu returns to practice Thursday
Chiefs' Tyrann Mathieu and Bills' Dion Dawkins enjoying Pro Bowl
The NFL Conference Championship Matchup Guide - The Ringer
Tyrann Mathieu Ruled Out of Chiefs-Bills Game Due to a Concussion - The New York Times
AFC Divisional Playoff: Bills lose a heartbreaker to Chiefs in overtime
Chiefs S Tyrann Mathieu knocked out of divisional-round game vs. Bills
Bills vs. Chiefs in AFC Championship: How to watch, odds, stats, stories, and more
Chiefs' Tyrann Mathieu and Bills' Dion Dawkins enjoying Pro Bowl