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2021 AFC Divisional playoff game (Buffalo–Kansas City) - Wikipedia
Instant analysis: Bills lose in heartbreaking fashion vs. Chiefs
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Chiefs outlast Bills in OT to reach AFC title game - The San Diego Union-Tribune
Bills lose heartbreaker to Chiefs in OT, 42-36
Let us pray for no overtime in 49ers-Rams NFC title game
Explained: NFL's new overtime rule for the playoffs - Los Angeles Times