If the first 20 years of Vikings history were defined by success but near-misses in the Super Bowl, the past 30 years have been defined by success but near-misses in the NFC title game.

What those who have followed the Vikings since the mid-1980s remember is that the best Minnesota seasons since Super Bowl appearances were routine generally have come via the surprising emergence of a quarterback. The Vikings have reached the NFC title game four times from 1987-present.

The 2000 team was led by first-year starter Daunte Culpepper, who was drafted a year earlier. That team went to the NFC title game and was, ah, noncompetitive in a 41-0 loss to the Giants. Culpepper taking over wasn't a complete surprise, but there had at least been offseason whispers of bringing in veteran Dan Marino (who instead retired).

Three other seasons are better examples (and two honorable mentions QBs who led playoff seasons — Gus Frerotte in 2008 and Jeff George in 1999).

• The 1987 Vikings rose to prominence and engineered a playoff run thanks to the arm of Wade Wilson, a 1981 eighth-round draft pick who had started 10 games in his career before 1987. Tommy Kramer was the entrenched starter, having gone to the Pro Bowl in 1986, but he battled injuries in 1987 and opened the door for Wilson.

The QBs split time in 1987, with Kramer getting the start in the Vikings' playoff opener — only to be reinjured early with Wilson taking over. He led huge wins over the Saints and 49ers before the Vikings — who went just 8-7 in the regular season, but really 8-4 since they went 0-3 with replacement players during the labor stoppage — lost 17-10 to Washington in the NFC title game.

ADVANCE FOR WEEKEND EDITIONS JAN. 16-17--FILE--Minnesota Vikings Randall Cunningham celebrates a 68-yard touchdown by Vikings receiver Cris Carter against the San Francisco 49ers at 3Com Stadium in San Francisco in this Jan. 3, 1998 photo. After all those years of unfulfilled promise in Philadelphia, one long year of soul-searching and one season as a little-used backup, Cunningham is about to play for the NFC championship for the first time in his life. The Vikings play the Atlanta Falcons on Sunday, Jan. 17, 1999, in Minneapolis.(AP Photo/Eric Risberg) ORG XMIT: MIN2017112017234955

• The 1998 Vikings, of course, started the year with Brad Johnson as the main quarterback. He had started 25 games combined for Minnesota the previous two seasons. But Johnson was injured during the Vikings' second game of the year. Randall Cunningham took over and engineered an offensive explosion, keying a 15-1 season that ended infamously in overtime of the NFC title game.

• And then the 2009 Vikings lured Brett Favre to Minnesota late in training camp, and he had the best regular season of his long career before the Vikings' season again ended in overtime of the NFC title game. The Vikings had previously signed Sage Rosenfels, who was expected to compete with Tarvaris Jackson for the starting job.

So here's Case Keenum in 2017. He was signed to be Sam Bradford's backup, and potentially to be third-string if Teddy Bridgewater returned to health (as he has).

Instead, Keenum just beat his old team, the Rams, to move the Vikings to 8-2. He's now second in the NFL in Total QBR, behind only the injured Deshaun Watson. He played well in Bradford's absence and well enough to keep his job even though Bridgewater has been deemed ready to return.

It's a strange, wonderful story. But it's just an extension of the typical Vikings' QB playbook when they have succeeded in the past three decades: A veteran quarterback unexpectedly taking over and overachieving.

We'll see if Keenum can sustain it — and if this time it leads not just to a near-miss but the ultimate goal.