Marvin Lewis' squad had won four straight. In each of the final three, quarterback Andy Dalton had thrown for at least 325 yards and three scores.
Alone atop the AFC North, not many gave the Dolphins—owners of a four-game skid—a legit shot.
However, Miami responded to Cincinnati's mistakes when the game was on the line. Defensive end Cameron Wake nailed Dalton for a sack to win the meeting in overtime for just the third time in history.
Here are a few of the biggest takeaways from the major loss.