The Kansas City Chiefs followed up their first Super Bowl title in half a century by posting the NFL’s best record at 14-2, earning the AFC’s only first-round bye in the expanded playoff format. Here are the highlights:

• Before losing to the Chargers last weekend with Andy Reid resting his stars, the Chiefs had won 23 of 24 games.
• Patrick Mahomes won his last seven starts by 2, 4, 3, 6, 6, 3 and 3 points.
• For just the second time since the 1970 league merger, every team in the AFC playoffs has at least 11 wins. It also happened in 1980.