Mittelstadt registered an assist and five shots in Game 4 in a 5-1 victory over Winnipeg on Sunday.
Mittelstadt logged an assist, two shots on goal, two hits and two blocked shots in Sunday's 7-4 loss to the Stars.
Mittelstadt scored a power-play goal on four shots and logged a hit in Saturday's 7-4 win over Nashville.
Mittelstadt scored a goal on two shots and had one hit in Tuesday's 4-3 win over St. Louis.
Mittelstadt recorded one shot on net, one block and one hit in Friday's 2-1 overtime win over the Wild.
Mittelstadt was acquired by Colorado from Buffalo on Wednesday in exchange for Bowen Byram, per Elliotte Friedman of Sportsnet.
Mittelstadt supplied a power-play goal and an assist in Saturday's 7-2 win over the Golden Knights.
Mittelstadt scored the game-winning goal and added two assists, one on the power play, in Monday's 3-0 win over the Sharks.
Mitteldstadt notched two assists in Tuesday's 5-2 loss to the Kraken.
Mittelstadt (upper body) is expected to play in Thursday's season opener versus the Rangers, Lance Lysowski of The Buffalo News reports.