EDEN PRAIRIE— Case Keenum dropped back to pass for Minnesota in the first quarter against Cleveland. He faked a short throw to his right to running back Jerick McKinnon before stepping up in the pocket with hope for a bigger play.

Keenum kept moving forward with his receivers covered, trying to run for at least a short gain before Browns defensive end Carl Nassib corralled him for a 1-yard loss.

The Vikings kicked a field goal at the end of that drive and recovered from a sluggish start that afternoon to win comfortably, leaving that sack harmlessly behind.

That takedown of Keenum behind the line of scrimmage still stands out almost a month later, though. That’s the only time he has been sacked in the last 5 1/2 games since taking over again for the hobbled Sam Bradford late in the second quarter at Chicago on Oct. 9. With a vastly improved offensive line providing impeccable protection, the Vikings (8-2) have won six straight games.

“Those guys are playing absolutely awesome,” Keenum said. “I love what they’re doing.”

The Vikings have the NFL’s best sacks-allowed-per-pass-play percentage at 2.91 percent, with only 10 allowed in 344 opportunities. Four of those came in the first half against the Bears when Bradford was bothered by the left knee that has kept him out of all but 1 1/2 games this season.

“We’re doing a good job of protecting. We’re changing protections. He’s doing a good job of moving in the pocket.  He’s getting the ball to the right place,” coach Mike Zimmer said.

For as much credit the front five has deservedly received for the time Keenum has had to throw this year, Keenum himself is a significant factor in the startlingly low sack total.

He is quicker and more elusive than Bradford, moving around behind the line with a keen blend of awareness and boldness. There was no greater example of this than on Sunday against the Los Angeles Rams, when on second-and-5 from the 30-yard line, Keenum sidestepped Robert Quinn and ducked under Aaron Donald to buy just enough time for an on-target heave to Adam Thielen that netted 12 yards late in the first quarter.