"To me, his center line, vertebrae kind of, doesn't get out of control or off balance when he moves," said former NHL goalie Marty Turco, who played five games with Rask and the Bruins in the 2011-12 season, his last in the NHL. "That allows him to track the puck the best and be upright after each movement to make consecutive saves and moves. He is never out of position due to his balance on his skates and his tracking ability, hence the confidence, absorption of pucks, placement of rebounds and ability to steal games."
Case in point: the first period of Game 3 against Carolina on Tuesday, which was arguably Rask's best period in the playoffs.
Boston knew the Hurricanes would come out aggressively, desperate, looking to push back after a 6-2 loss in Game 2 at TD Garden. It happened as expected and the Bruins had no answer except for Rask, who made 20 saves in the period, 12 on the penalty kill, to keep it 0-0.
Rask said he didn't even see some of the shots, but his positioning was spot on so he stopped them.
"He really hasn't had a poor night," Cassidy said. "He's had a couple that I would say that were above average, the rest have been very good. [Tuesday], the first period, he was excellent. He was the difference."
So much so that Rask left the Hurricanes demoralized going into the intermission, lamenting their inability to put at least one past him in the best period they played in the series.
It was pretty much the end for Carolina. Rask took away any mojo it might have had.
"He's doing a great job of tracking the puck and with his rebound control," said NHL Network analyst and former NHL goalie Kevin Weekes. "He's in position and his feet are set, and he's on his feet more when pucks are in the corner. He's playing big."
Big enough to get the Bruins back to the Stanley Cup Final for the third time this decade.
Rask watched from the bench in 2011 when Tim Thomas helped Boston win the Stanley Cup. Rask brought the Bruins into the Cup Final in 2013. He had a .932 save percentage (16 goals on 234 shots), but the Bruins couldn't get enough to help him out against the Blackhawks.
The way Rask is trending, it's easy to see why the Bruins will likely be the favorite to win the Stanley Cup regardless if they play St. Louis or San Jose. His candidacy for the Conn Smythe Trophy is not up for debate.
"He's definitely in the zone," Bruins center Patrice Bergeron said. "He's doing some amazing things."
Grzelcyk said, "He's unbelievable."