They get their sticks in passing lanes, volunteer to block shots, and can steer a puck through heavy traffic and on the net.
Oilers prospect Markus Niemelainen, who hails from Finland but safeguards the Saginaw Spirit's d-zone, fits that uncelebrated, yet highly valuable player mould.
Joining the Oilers organization in the third round (63rd overall) of the 2016 NHL Draft, the towering 18-year-old's game isn't overly captivating but does possess a certain type of sophistication.
"He's never going to be Erik Karlsson," admitted Saginaw Spirit Head Coach Spencer Carbery. The Saginaw bench boss' words hold true for almost all those who play the position.
"Hockey people use the term, 'a puck-moving defenceman that can also help out offensively,'" he continued. "He's not going to 'wow' you. He's not going to run the power play, but he can break pucks out under pressure against teams that have a heavy forward line that get pucks behind you."
Niemelainen's game is twofold. His skating, transition, and patience with the puck allows him to play smart defensively. He flourishes by making good decisions on the ice, rather than abiding by brute force like so many defencemen his size are urged to do.
"That's where he excels: in being able to move pucks and make crisp plays up ice to get into your forwards' hands," Carbery said.
Niemo - the young Finn's moniker - also has the talent to chip in offensively. Last season in Saginaw he recorded nearly a point every second game, finishing the year with a goal and 26 assists for 27 points in 65 games.
"When there are opportunities to get involved, whether it's off the rush or in the offensive zone, I think he does have some ability there to contribute."
The Finnish skater believes he has some work to do before he makes it pro, but the raw ability he possesses is undeniably present.
"There's a lot to work on," Niemelainen said. "I want to be more consistent. Work on getting my shots through, getting stronger. I also want to improve my strengths like be a better skater."
Having developed most of his game on the larger, wider European playing surface, Niemelainen's biggest asset is his skating. On the ice, the Kuopio native possesses that eloquent European genre of hockey that's become customary for so many premier blueliners in the League.
"He's a big defenceman that's a really smooth skater that can rush the puck, that can go back for dump retrievals and break pressure," said Carbery. "He stands out in that respect, so I think he's very, very noticeable for a defenceman that's 6-foot-4 and can move so fluently out on the ice."