Wallstedt stopped both shots he faced in relief of Filip Gustavsson during Tuesday's 4-3 overtime win over Chicago.
Gustavsson left the ice for a little over three minutes during the third period due to an equipment issue, and Wallstedt held down the fort until he returned. Wallstedt hasn't won a game since Jan. 31 and has fallen behind Gustavsson in the pecking order for the Wild. However, the 23-year-old Wallstedt has a 2.20 GAA and .922 save percentage over four outings in March despite a record of 0-1-2.