MIAMI GARDENS, Fl. (AP) – The comeback Chiefs did it again and are Super Bowl champions. Patrick Mahomes threw for a pair of touchdowns in the game’s final 6:13, helping the Kansas City Chiefs erase a 10-point deficit and beat the San Francisco 49ers 31-20 in Super Bowl 54. The go-ahead score: A 5-yard touchdown pass to Damien Williams with 2:44 left.

Williams is a former Miami Dolphins running back and returned to his former field — Hard Rock Stadium — to enjoy the most significant night of his career. Williams finished off the title march with a touchdown run with 1:12 left, a 38-yarder around the left end to seal the outcome.

Mahomes righted himself after throwing interceptions on consecutive possessions. The comeback started when Mahomes engineered a 68-yard drive that was capped by a one-yard scoring toss to Travis Kelce. Mahomes shook off a slow start to finish 26 of 42 for 286 yards, two touchdowns and two interceptions. Tyreek Hill had 105 receiving yards on nine catches, and Sammy Watkins had five receptions for 98 yards.

The 49ers took advantage of Mahomes’ first interception by turning it into a one-yard scoring run by Raheem Mostert late in the third quarter. Mostert’s scoring run gave San Francisco a 20-10 lead.

Chiefs coach Andy Reid earned his 222nd career victory, and his first in a Super Bowl. No other coach had won more games without winning an NFL championship.

The 49ers fell short in their bid for a record-tying sixth Super Bowl title, even though they dominated for much of the first 3 1/2 quarters. Garoppolo threw for 219 yards and kept the Chiefs’ defense guessing by completing passes to eight receivers.