KANSAS CITY, Mo. (AP) — Things just got a little more interesting in the AFC West after Philip Rivers engineered a very late comeback. The Los Angeles Chargers scored two touchdowns in the final 3:49 before Rivers hit Mike Williams for a two-point conversion with just four seconds left to lead a 29-28 win over the Chiefs in Kansas City.

The Chiefs led 28-14 and were looking at their 10th straight win over the Chargers until Justin Jackson scored on a three-yard run. Following a Kansas City punt, Rivers kept the winning drive alive with a fourth-down pass to Travis Benjamin, and Los Angeles received some help from a questionable pass interference call that gave the Chargers first-and-goal at the Kansas City 1 with eight seconds remaining.

Rivers was 26 of 38 for 313 yards, two touchdowns and two interceptions as the Chargers moved into a virtual tie with Kansas City for the division lead at 11-3. Williams accounted for 20 points with three touchdowns and the game-winning conversion catch that allowed Los Angeles to clinch a playoff berth.

Patrick Mahomes threw for a pair of first-quarter touchdowns and was 24 of 34 for 243 yards and no picks.