Helene St. James of the Detroit Free Press answered a fan question in regards to Detroit's defense...
DeKeyser, Hronek and Nemeth are part of the top four. Based on how well he played in his first season in North America (22 points in 49 games with the Grand Rapids Griffins), Moritz Seider will get a good look during the exhibition season to see if he can be the fourth guy in that group. He’s 6-foot-4, 207 pounds, shoots right, and is accustomed to running a power play. Potentially, the power-play units will be run by Seider and Hronek, and DeKeyser and Nemeth will handle top penalty-killing duties.