Epic 18-point comeback gifts Chicago Bears first playoff win in 15 years

Caleb Williams and the Chicago Bears are heading to the NFC divisional round following another comeback victory.

All-Pros Matthew Stafford and Puka Nacua helped the Los Angeles Rams advance with a last-minute win.

The NFL playoffs kicked off Sunday (AEDT) with two wacky, wild-card games.

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The Bears (12-6) trailled the Green Bay Packers 21-3 at half time and 27-16 with just under seven minutes left in the fourth quarter before Williams threw a pair of touchdown passes.

His 25-yard TD toss to D.J Moore put Chicago ahead 31-27 with 1:43 remaining. Then Jordan Love's desperation heave into the end zone from the Bears 28 was knocked down as time expired to secure Chicago's first playoff win since the 2010 season.

Williams finished with 361 yards passing, two TDs and two interceptions for the No.2 seed Bears, who will host the Rams (13-5) or Philadelphia Eagles next weekend.

"It's 60 minutes of football, we understand and know who we are," Williams told reporters post-match.

"We understand what this means to the city, the organisation and us. You keep going, keep going and fighting and you look up at the clock and see who's won."

In the opener on wild-card weekend, Stafford threw a 19-yard touchdown pass to Colby Parkinson in the final minute and the Rams rallied to beat the Carolina Panthers 34-31 in a game that was much closer than expected.

The Rams were double-digit favorites on BetMGM Sportsbook against the Panthers (8-10).

They jumped to a 14-0 lead but couldn't take advantage of first-half turnovers and allowed Carolina to get within 17-14 at half time.

Stafford, who earned All-Pro honors for the first time in his 17-year career on Sunday, threw for 304 yards, three TDs and had one pick.

Nacua, who was a unanimous All-Pro selection, had 10 catches for 111 yards and one TD and also had a 5-yard TD run.

The Rams are back in the divisional round for the second straight season.

Last year, they were 13 yards away from eliminating Philadelphia before a sack and an incomplete pass ended their season with a 28-22 loss.

No.5 seed Los Angeles will face No.1 seed Seattle if the Eagles lose to the San Francisco 49ers on Monday morning (AEDT).

Bryce Young's 7-yard TD pass to Jalen Coker put the Panthers ahead 31-27 with 2:43 remaining but Stafford drove the Rams 71 yards in two minutes.

Parkinson made an outstanding, tightrope catch for the winning score and the defence held.

Behind coach Dave Canales and improved QB Bryce Young, the Panthers have reason to be optimistic about the future after winning a weak NFC South and nearly pulling off a major upset.

The Packers (9-8-1) finished the season with five straight losses.

They were 9-3-1 before All-Pro edge rusher Micah Parsons tore his ACL in a loss to Denver on December 15.