The Toronto Maple Leafs on Monday placed the 31-year-old defenseman on injured reserve, per James Mirtle of the Globe and Mail.
Hunwick has missed the last three games with a lower-body injury.
In six games this season, Hunwick has just one assist, while his puck possession numbers are hovering just above 45 per cent in 83:11 of ice time at five-on-five.
With Hunwick out, the Maple Leafs would be down to seven defenseman.
Meanwhile, 23-year-old right shot blue liner Frank Corrado has yet to play a game this season. Instead, he’s been kept as a healthy scratch through all nine games.