Mahomes' late magic inspires comeback kings Kansas to glory

San Francisco went 4-12 in 2018 and Shanahan was on something of a hot seat this season. He came close to a ring once again, but down the stretch the Niners couldn't slow the no-huddle attack at which Mahomes, Hill, Kelce, Williams and all the other Chiefs excel.

"We have heart," Mahomes said. "We never give up and those guys around us, the leaders on the team, have that mindset that we never give up."

The fourth quarter fireworks by the Chiefs were along the lines of the expected offensive explosion. Earlier, there were some strong drives but not a lot of huge plays.

The 49ers used up nearly six minutes on their opening drive, yet got only Robbie Gould's 38-yard field goal. Kansas City took up 7:26 for its next march, including a fourth-and-1 run by Williams on a direct snap to the 49ers 1. All four Chiefs in the backfield spun around before the snap.

Mahomes took it in to end the 15-play series on a run option.

The 7-3 deficit was the first for San Francisco since Game 15. It soon became 10-3 after Jimmy Garoppolo's ill-advised lob under pressure was intercepted by Bashaud Breeland. Another fourth-down gamble paid off for KC, with Williams gaining 3 on a pitchout. But the Chiefs stalled and Harrison Butker kicked a 31-yard field goal.