Markus Golden’s post-Missouri career has been up-and-down. After four seasons in Arizona, he’s looking to re-establish himself as an elite pass-rusher with his new team, the New York Giants. And the Giants are counting on a return to form for Golden.

“He’s a double-digit sack guy,” Giants outside linebackers coach Mike Dawson recently told Paul Schwartz of the New York Post. “Once you guys watch him train and watch the way that he plays, and you go back and watch his pre-injury film, just the way he’s all over the field in the run game and the pass game. When the ball is down the field, he’s backside chasing that thing like a mad man. That intensity and that level of effort he plays with is going to lead to production with him.”

Golden tore his ACL early in the 2017 season. He blames a disappointing 2018 season on not being fully recovered from the injury.

“I wasn’t 100 percent,” Golden told The Post. “I still had a brace on. If I wouldn’t have worked hard I could sit there and be sad about it, but when you put all the work in and grind it out, you got no choice but to be happy with yourself and move on.”

Giants defensive coordinator James Bettcher was Arizona’s defensive coordinator before heading to New York in 2018. He knows what kind of production to expect from a full-speed Golden – and he’s confident he’ll get just that this fall.

“I love how he is moving right now and I love his work,” Bettcher said. “He is a guy that is going to play exceptionally hard. One of the identifying qualities we needed our defense to look like was . . . relentless — work relentless and play relentless. I think that is probably the epitome of Markus.”

If Golden has the kind of the year the Giants coaches are expecting, the club will likely need to shell out to keep him for 2020. Golden is playing on a one-year, $3.75 million contract.