WATCH: Arik Armstead hits Kirk Cousins for first sack of postseason

The 49ers defense opened a big series vs. the Vikings with an Arik Armstead sack.

The 49ers defense got a big stop after their offense stalled out near midfield. The Vikings dropped quarterback Kirk Cousins back on first down and Arik Armstead blew through the right side of the line for a sack and an eight-yard loss.

That was Armstead’s first sack since he had two in Week 12 vs. the Packers. The Vikings never got out from behind the sticks and punted.