Since we last checked in on three up, three down, the Bruins went through their shares of ups and downs during that span. So we have a good amount of material to work with, but we’re also going to change things up a little bit.

Let’s get right to it.

Tuukka Rask

Given his 5-0-0 start and his performance since coming back from a lower body injury over the last two games, Tuukka Rask is an obvious choice to kick off this week’s list. Despite the setback last week that caused him to miss three games against the Canadiens, Wild and Rangers — a span where the Bruins were outscored 14-4 — Rask picked up right where he left off after his performance against the Devils on opening night stopping 56 of 57 shots against the Red Wings and Panthers. Rask carried a shutout streak of 131:21 that was snapped by Dennis Magin in the B’s 2-1 win in South Florida.

With his 1.20 goals against average and .961 save percentage, Rask’s is looking more like the Vezina Trophy winner in 2014. His performances have kept the “trade Tuukka” crowd quiet in the early part of the 2016-17 season.

Fourth line

For two years after Shawn Thornton departed, the Bruins had a revolving door of forwards entering their fourth line. Early on, it looks like Claude Julien has found his players to fill out the top 12.

Against the Red Wings, the Bruins saw Tim Schaller score on a bad angle shot and that was the lone goal that they needed. Three nights later in Florida, Dominic Moore gave the Bruins a 2-0 lead with a shorthanded goal (more on the penalty kill below).

Aside from Patrice Bergeron, Brad Marchand, David Pastrnak and David Backes, the fourth line has provided most of the production both on the stat sheet and through their play. Combined, the trio of Moore, Schaller and Noel Acciari have accounted for 20 percent of the team’s offense. All three names of the aforementioned fourth line have contributed to the penalty kill and are seeing their ice time increase thanks to their energy and alertness on both ends of the ice.

We’ll see if this trend continues when Pastrnak (returning tomorrow from a two-game suspension) and Backes (still recovering from an elbow procedure) are inserted back in the lineup.

Penalty kill

Going to the penalty box is not something that the Bruins want to do frequently. Their 41 shorthanded attempts in nine games are third-most in the league behind Calgary (47) and Anaheim (46).

Luckily for the Black and Gold, their penalty kill is shining and that was evident in Tuesday’s win against the Panthers where they allowed just six shots in seven shorthanded situations. Moore’s shorthanded goal — the team’s first of the season — was the icing on the cake for the PK unit.

More often than not, the penalty kill has been a strength of Julien’s teams during his 10-year reign at the helm. With the seventh best PK success rate at 87.8 percent, it looks like that trend should continue as long as Rask stays healthy.

It hasn’t been all sunny for the Black and Gold, however. Let’s take a look at the downward trends.

Bruins third line

Where to begin on this one. Well, let’s start with the Jimmy Hayes-Matt Beleskey combination. Since late last season, the two off-season additions of 2015 have been anything but productive. This season, the duo have combined for a grand total of zero points and are a minus-14. Going back to last year, Hayes and Beleskey have scoreless streaks of 25 and 13 games, respectively.

The players that are centering Hayes and Beleskey? Well, they haven’t been much better. From Riley Nash to Ryan Spooner and Austin Czarnik, Julien hasn’t seen any production from his third line centers while skating with Hayes and Beleskey — though Czarnik and Spooner have been playing fairly well on a line with David Krejci over the last two games.

With Backes’ and Pastrnak’s vacancies, the Bruins have struggled to put pucks in the back of the net. The third line hasn’t done any favors to help that cause and breaking up Beleskey and Hayes is pretty much overdue at this rate.

Bruins power play

It may seem like a distant memory, but at this time last year, the Bruins had one of the best power plays in the league. Ever since January, their production has gone down as teams prepared according and the B’s man advantage unit failed to make the necessary adjustments that could have helped them back into a playoff spot in 2015-16.

Like the third line production, the power play effect has carried over into the first nine games of 2015-16 and are ranked dead last with just two goals on 32 attempts (a success rate of 6.3 percent). The stagnant puck movement and juggling personnel have contributed to bringing back the memories of the Bruins’ powerless play from their Stanley Cup run in 2011.

Malcolm Subban

Surely it’s hard to pin the Bruins’ loss to the Wild last week on Subban in his second career start. Aside from giving up a second period goal from Ryan Suter, the 2012 first round pick was hardly to blame thanks to the defense hanging him out to dry.

With or without a defense, Subban has struggled mightily in his stints with Boston and Providence. Over at the AHL level, Subban is 0-4-1 with a 4.10 goals against average and .854 save percentage.

The fact that there seems to be a carryover effect from suffering a fractured larynx last season isn’t helping either. Subban’s development has hit the proverbial brick wall and his chances of one day becoming a starter in the NHL are regressing.