Brown is expected to be sidelined for the rest of the season with an undisclosed injury that he suffered on Monday. Jacob Bernard-Docker will replace him in the lineup on Wednesday.
Kulak has been scratched for six straight games but will replace Erik Gustafsson in the lineup on Saturday. Kulak, who will likely skate on the third pairing with Jon Merrill, has one goal and six assists in 39 games this season.
Smith had an injury scare in practice over the weekend but is expected to be available for Monday's game in Winnipeg. This is obviously a huge relief for the Oilers, who have relied on Smith to start 55 percent of their game so far this season.
With Jon Merrill done his quarantine and set to make his Canadiens debut on Wednesday, Brett Kulak will head to the press box. Kulak has picked up just three points (1G / 2A) in his last 25 games.