FRISCO — When Robert Quinn recorded his third sack Sunday in two games, the Cowboys defensive end balled his right hand into a shape resembling a snake head and sunk his hips low to the ground, contorting his body and slithering forward with the top of his cleats scraping against the turf.

Days after the celebration, the defense’s passing game coordinator Kris Richard was still amused.

“Did you see him after the play?” Richard said Thursday. “There’s no possible way. He looked like a cobra. Shoot, man. He’s like a cobra out there.”

Cowboys DE Robert Quinn has a snake-like ability to bend corner and close on quarterbacks. “He’s the Black Cobra. That’s what he is, and he strikes. He strikes pretty viciously, too.” https://t.co/GdPQdhMtjI pic.twitter.com/a7w4L6wrZ8 — Michael Gehlken (@GehlkenNFL) October 4, 2019

Hence the nickname.

Quinn missed the entire preseason to a fractured hand and first two regular-season games to an NFL suspension. In the two games since, he has demonstrated the physical skills that prompted teammates to coin him the “Black Cobra” this offseason.

A snake-like ability to bend the corner as an edge rusher helps contribute to his impact and moniker. The 29-year-old writhes his body into implausible positions, allowing him to cut toward a quarterback when others might still be rounding their way around an offensive tackle.

Defensive end Tyrone Crawford has remarked about Quinn’s movements since training camp.

“He’s the Black Cobra,” Crawford. “That’s what he is, and he strikes. He strikes pretty viciously, too. ... That was his celebration and everything, but prior to that, we started calling him the Black Cobra because he slithers. Not in a bad way. He can bend like no other, and obviously, when you’re in your ninth year and your ankles are still bending like that, it’s a good thing.”

Said defensive end DeMarcus Lawrence: “(Defensive coordinator Rod) Marinelli called me the Racing Lizard. Quinn is the Snake because he ain’t got no knees or ankles.”

The Cowboys acquired Quinn in March from the Miami Dolphins for a 2020 sixth-round draft pick.

Despite the injury and suspension, the swap seems an obvious bargain.

Offenses regularly have double-teamed Lawrence to begin this season. On the right side, opposite Lawrence, Quinn has given Dallas someone who can hold teams accountable. He has nine quarterback pressures in the past two weeks, tied with defensive tackle Maliek Collins for the team lead in that span, according to Pro Football Focus.

Lawrence has seven in that period despite the attention received and various injuries through which he is playing; this week, Lawrence is on the injury report with knee, shoulder and heel ailments.

The Cowboys’ pass rush looks to complicate life Sunday for Green Bay Packers quarterback Aaron Rodgers.

“Exceptional. Rare,” coach Jason Garrett said Friday of Quinn’s bend. “I haven’t seen it very much in my life. ... Robert’s ability to bend coming around the corner is exceptional. His ability to bend and change directions is exceptional. We saw that when we played against him a number of times, but then when you see it up close, and it’s like, ‘Wow.’ It’s eye-opening.

“The thing that stands out the most about him, though, to us is his professionalism. He comes to work every day and has a young person’s mind. He wants to learn. He’s embracing every opportunity to get better. And then just his relentless spirit, both as a practice player and certainly playing in the games. He’s all over the place. He plays from the snap to the whistle, play after play after play, as well as anybody we have.”