First off, we have goaltender Keith Petruzzelli. The 24-year-old, drafted in the third round by Detroit in 2017, has yet to play in the NHL regular season. He spent the last three years split between the AHL's Marlies and ECHL's Newfoundland Growlers.
Next is defenceman Tommy Miller, who has also yet to make his NHL regular season debut. Miller played 40 games for the Marlies last season, as well as another 15 with the Growlers. Before that, the 24-year-old spent five seasons in the USA's College Hockey system.