The Calgary Flames are without their starting goaltender and the St. Louis Blues are unsure about the status of theirs.
Both teams also excel on the power play heading into their first meeting of the season Friday night in Calgary.
The Flames (4-4-3) remain without Miikka Kiprusoff, who may not return until after this month due to a sprained knee ligament. Leland Irving has taken his place.
St. Louis (7-5-1) is unsure when Jaroslav Halak will return. Halak is listed as day to day after missing the last five games with a groin strain, and coach Ken Hitchcock gave rookie Jake Allen his first career start over a struggling Brian Elliott in Wednesday's 4-3 overtime victory at Detroit.
Neither team will want their goalies to see too much of their opponents' power plays Friday. These are the Western Conference's best teams with the man advantage, with St. Louis a league-leading 34.7 percent and Calgary at 27.5.
Both have also had trouble on the penalty kill, with the Blues at 77.6 percent and the Flames at 72.5. Calgary hasn't left that unit exposed much, averaging a league-low nine penalty minutes.