MIAMI (AFP) — The Miami Dolphins booked their place in the National Football League playoffs after a last-second field goal from Jason Sanders gave them a thrilling 22-20 win over the Dallas Cowboys on Sunday.

The Detroit Lions also secured a postseason spot after clinching the National Football Conference North with a victory over the Minnesota Vikings while the Seattle Seahawks' late win over the Tennessee Titans kept their season alive.

Quarterback Joe Flacco continued his remarkable late-career comeback in the NFL as he led American Football Conference playoff hopefuls the Cleveland Browns to their third straight win with a 36-22 victory at the Houston Texans.

Miami becomes the second team in the AFC to secure a playoff place, following the Baltimore Ravens, but they were pushed to the brink by Dallas and their quarterback Dak Prescott.

After a grueling, physical encounter, Dallas got in front with a touchdown with just 3:27 left in the game after Prescott led an outstanding 17 play, 69-yard drive which culminated in a brilliant touchdown catch in the corner, under intense pressure from Brandin Cooks.

But Miami quarterback Tua Tagovailoa responded in kind, managing the clock perfectly as he led Miami down the field with a
64-yard, 12-play drive to set up Sanders.

Sanders, who made all five of his field goal attempts including three from over 50 yards, made no mistake from 29 yards to seal a crucial victory over a Dallas side that had already grabbed a spot in the NFC's playoffs.

"I think the key was the guys just having competitive greatness," Tagovailoa said.

"The defense did a great job, the offense did a great job, this is a great team and this is a great team win. It was a team win."

Elsewhere, the Detroit Lions clinched their first division title since 1993 as they secured the top spot in the NFC North with a 30-24 win over the Minnesota Vikings.

Jahmyr Gibbs had two rushing touchdowns for the Lions, the second coming early in the fourth quarter, but victory was only clinched with just 49 seconds left, when Ifeatu Melifonwu intercepted a pass from Vikings quarterback Nick Mullens — the Lions' fourth pick of the game.

The Seattle Seahawks, fresh from their thrilling Monday night win over the Philadelphia Eagles, further boosted their NFC playoff chances with a 20-17 win at Tennessee.

Seattle (8-7) trailed 17-13 in the final minute of the game before Colby Parkinson pulled in a brilliant catch from a 5-yard pass from Geno Smith to win the game.

The Browns meanwhile turned to Flacco, a 38-year-old who was without a team at the start of the season, as their fourth quarterback in an injury-plagued year earlier this month, and he has kept them on track for a postseason berth.

He looked back to his very best on Sunday as he threw for three touchdowns and 368 yards in a win which took the Browns to a 10-5 record in the AFC.