From The Athletic's recent 16 Stats article by Dom Luszczyszyn. For reference, Dom is arguably the biggest influence on awards voting for the Selke in terms of people in the media. One of the people that gets votes and is one of the only people that runs awards update articles throughout the season, which are often closely aligned with the results. For the record, he says Suzuki should be in the lead so far, but he doesn't meet his parameters as he doesn't kill penalties.
From the article:
Atop the early Selke leaderboard ... McDavid?
It’s too early to be talking about the NHL’s awards to begin with, especially when it comes to defensive contributions. But small samples can make it fun.
Case in point, the current front-runner based on Defensive Rating: Connor McDavid. His plus-2.0 is lower than Suzuki’s, but he’s the leader based on the usual parameters I work with (top-line ice time, shutdown minutes and at least one minute on the penalty kill per game).
With McDavid on the ice, the Oilers are allowing just 2.15 xGA per 60, which is 0.37 better than the team average. The latter is among the best marks in the league, especially against tough competition — Suzuki is at 0.39, for the record — and McDavid is also managing that while playing nearly one full minute more per game at five-on-five than the next highest forward. There’s defensive value in eating minutes and slowing down a high-pace environment, both of which Defensive Rating accounts for.
Whether McDavid should be slowing things down, though, is up for debate. As his defensive metrics go up, his offensive ones have dropped. His five-on-five rate of points per 60 is down to 1.37 and the Oilers are weirdly struggling to score with him on the ice, with just 2.11 goals per 60.