Mrazek allowed two goals on 25 shots in Tuesday's 3-1 loss to the Flames. The third goal was an empty-netter.
The Flames also tallied a power-play goal in the contest. Mrazek has put in two decent performance over three starts, but he has a 1-2-0 record with eight goals allowed on 89 shots. The 32-year-old goalie has settled in well enough to keep his No. 1 job, and he'll likely be between the pipes for the Blackhawks' home opener Thursday against the Sharks.