As the Chiefs seemed to slog and wobble through most of a 15-2 regular season, you had to lean on testimony from the last few seasons that any win is a good win, and that what wasn’t killing them was making them stronger.

KC’s close-game magic — and domination over the Buffalo Bills in the postseason — lived on another game. Quarterback Patrick Mahomes engineered a fourth-quarter, go-ahead drive, and the Chiefs defense came up with two massive stops in KC’s 32-29 home victory over the Bills in the AFC Championship on Sunday.