Their individual strengths and weaknesses can leave them vulnerable to specific styles of attack.
When the road-weary Canucks wrapped up a five-game trip against the Minnesota Wild on Oct. 24, looking to play a tight-checking, low-event game, the more compact, conservative Nilsson was the choice, even though he'd been pulled after giving up four goals on 17 shots in 10:40 against the Boston Bruins in his previous start. The fact that Markstrom won the two previous games before the Wild game was not the deciding factor.
Nilsson responded by stopping all 29 shots he faced in a 1-0 victory, his second shutout in his four starts. Two days later, he was in goal again, this time against a more skilled, more attacking group from the Washington Capitals. It was a matchup that seemed to favor Markstrom's style, but Nilsson stopped 27 of 29 shots in a 6-2 win.
Nilsson did not make a third straight start though. Markstrom was back in against the Dallas Stars in the next game as his more explosive lateral movement could counter a potent attack that stresses rapid puck movement in the attacking zone.
The strengths and weaknesses of each goalie are not the only factor in who starts.
The decision to start Nilsson in Minnesota likely included signs Markstrom might need extra practice time with Cloutier to tighten up a few technical aspects. Often, as a goalie evolves into a No. 1 role, he loses some of his base because of the diminished practice time available. A balance between managing rest and managing the finer details in his game between starts becomes more difficult.
If Nilsson continues to have a .943 save percentage and Markstrom remains at .916, closer to the NHL average (.910 this season), the balance in starts may shift more in Nilsson's favor, regardless of style factors.
In the meantime, it's refreshing to see the Canucks considering the way each goalie plays, as well as how well they're playing, in making decisions and not relying on the traditional win-and-you're-in or starter-backup conventions that dominate conversations about goaltending usage.