And then there were two.

Both of the conference finals now are complete, and it’ll be the Boston Bruins and St. Louis Blues facing off in the 2019 Stanley Cup Final.

The last time these two sides met in the Cup Final was 1970 which saw the Bruins win in a sweep, with Bobby Orr’s famous goal in Game 4 clinching the series.

Before the puck drops Monday night at TD Garden, NESN.com’s Logan Mullen and Lauren Campbell broke down the upcoming series.

STATS HEAD-TO-HEAD (REGULAR SEASON)
Goals/Game: Boston 3.13 (11th) | St. Louis 2.98 (15th)
Goals Allowed/Game: Boston 2.59 (3rd) | St. Louis 2.68 (5th)
Power Play: Boston 25.9 percent (3rd) | St. Louis 21.1 (10th)
Penalty Kill: Boston 79.9 (16th) | St. Louis 81.5 (9th)

SEASON SERIES
— Season Series finished tied 1-1
Jan. 17: Boston 5-2
Feb. 23: St. Louis 2-1 (SO)

SCHEDULE (all times Eastern)
Monday, May 27: St. Louis at Boston, 8 p.m.
Wednesday, May 29: St. Louis at Boston, 8 p.m.
Saturday, June 1: Boston at St. Louis, 8 p.m.
Monday, June 3: Boston at St. Louis, 8 p.m.
Thursday, June 6: St. Louis at Boston, 8 p.m. (if necessary)
Sunday, June 9: Boston at St. Louis, 8 p.m. (if necessary)
Wednesday, June 12: St. Louis at Boston, 8 p.m. (if necessary)

FORWARDS
Bruins Projected Lines
Brad Marchand–Patrice Bergeron–David Pastrnak
Jake DeBrusk–David Krejci–David Backes
Marcus Johansson–Charlie Coyle–Danton Heinen
Joakim Nordstrom–Sean Kuraly–Noel Acciari

Blues Projected Lines
Jaden Schwartz–Brayden Schenn–Vladimir Tarasenko
Sammy Blais–Ryan O’Reilly–David Perron
Patrick Maroon–Tyler Bozak–Robert Thomas
Ivan Barbashev–Oskar Sundqvist–Alex Steen

Logan: While St. Louis’ top line might not have quite as much name recognition as Boston’s, it’s been on pretty equal footing this postseason.

Schwartz is playing out of his mind this postseason to the tune of 16 points, which only has elevated the play of his linemates Schenn and Tarasenko. So while the Bruins’ top trio has plenty of experience and played well against the Carolina Hurricanes, the matchup pretty much is a push.

The Blues and Bruins also match up well down the middle. Boston boasts a sharp grouping of centers, but St. Louis arguably has the best four centers the Bruins will have faced this postseason (especially considering Nazem Kadri’s suspension in the first round).

Speaking of matching up well, the Blues’ fourth line is as good a bottom unit as the Bruins’ fourth line has seen all playoffs. Boston’s fourth has had a considerable advantage against its counterparts for pretty much the entire spring. That’s probably going to be put to a stop in the Cup Final.

All told, these two sides’ forwards match up well, and it wouldn’t be shocking to see the coaches match lines throughout the series.

Advantage: Push

Lauren: The Bruins’ top line has looked unstoppable of late, especially in their Eastern Conference Final sweep of the Hurricanes. But Boston also has received help from its bottom six throughout its playoff run. Coyle, Johansson and Nordstrom all have played pivotal roles throughout the playoffs. And even though Boston will be without Chris Wagner, Acciari will step back in on the fourth line.

St. Louis’ top line, of course, helped propel the Blues to the position they’re in now, but the trio of Marchand, Pastrnak and Bergeron are averaging almost 3 1/2 goals per game more than the Schwartz, Schenn and Tarasenko line. But you can’t forget about the Blues’ physical forecheck — especially Schwartz — who leads St. Louis with 12 goals in these playoffs.

The Blues also will need to be cautious of Boston’s power-play unit, which has been on fire through the three rounds, converting over 1/3 of its chances.

Advantage: Bruins

DEFENSE
Bruins Projected Pairings
Zdeno Chara–Charlie McAvoy
Torey Krug–Brandon Carlo
Matt Grzelcyk–Connor Clifton

Blues Projected Pairings
Joel Edmundson–Alex Pietrangelo
Jay Bouwmeester–Colton Parayko
Vince Dunn–Carl Gunnarsson

LoganSimply put, the Bruins have the skill advantage while the Blues have the size advantage. Which advantage proves to be more important remains to be seen, of course.

There’s no questioning the experience Chara brings and the talent McAvoy possesses, but Edmundson and Pietrangelo have been a heck of a duo. Meanwhile, Parayko is an absolute house while Bouwmeester is another seasoned vet, but they don’t necessarily have a clear advantage over the Krug-Carlo pairing, which is a great fusion of offensive prowess and stay-at-home defense. Grzelcyk and Clifton have shown the league this postseason just how valuable they are, and they could give St. Louis trouble.

Both groups have nice depth too, with John Moore expected to be a healthy scratch for the Bruins and Robert Bortuzzo for the Blues. So in the event there are injuries, neither side should fall off too much.

This has been a really good postseason for both defenses, but the Bruins’ blueliners have been better, albeit narrowly.

Advantage: Bruins

Lauren: The Blues’ defense has been a huge reason for vaulting the team to the Cup Final. The blueline will need to slow down the speed of the Bruins, much like they did against the San Jose Sharks in the Western Conference Final.

Chara, who missed the clinching Game 4 of the Eastern Conference Final against the Hurricanes, is expected to be ready for Game 1, but there’s no telling whether he’ll be 100 percent. McAvoy will need to have a big series and use his body in order to stop the Blues’ forwards.

The St. Louis blueliners have a lot of size. Not to mention, the Blues were just one of just two teams which had three defensemen score at least 10 goals in the regular season.

Advantage: Blues (narrowly)

GOALIES
Bruins Goaltenders
Tuukka Rask
Jaroslav Halak

Blues Goaltenders
Jordan Binnington
Jake Allen

Logan: Let’s not overcomplicate this: Binnington has been great, but Rask has been better, and he has experience on his side.

Binnington’s time with the Providence Bruins probably will be among the most overstated storylines of the series, but Bruins goalie coach Bob Essensa is among the best at what he does. That means the Bruins, in addition to the knowledge they already have on Binnington from his time in the organization, will be well-versed on the rookie’s weaknesses.

Advantage: Bruins

Lauren: Rask has been absolutely stellar throughout the playoffs and totes a .942 save percentage through three rounds. He’s given Boston a chance to win game in and game out and there’s no doubt he’ll carry that explosive energy into the Cup Final.

Binnington also is having an amazing run between the pipes. He allowed just 1.89 goals-per-game during the regular season but saw that number jump to 2.36 thus far in the playoffs. Rask has had the opposite happen to him — allowing 2.46 goals per game in the regular season while giving up just 1.84 in 17 playoff games. Bennington has let at least four goals by on five occasions in his playoff run, while Rask let up the same amount just once.

Advantage: Bruins

X FACTOR
Logan: Heinen

The Maroon-Bozak-Thomas third line for St. Louis is so, so good, but the Bruins’ third group is no slouch, either. Heinen is a responsible defensive player, but offensively he hasn’t made much noise. If he can step it up on that side of the ice, it certainly would boost the Bruins’ bottom six.

Lauren: Backes

It’s hard to talk about this series without mentioning Backes, who spent his first 10 NHL seasons with the Blues. St. Louis has a big and physical defense, so having Backes’ presence up front will be huge in order to help control the blueliners. Plus, after being a healthy scratch throughout some of the playoffs and having an impact in the games he did play, the 35-year-old will be primed to play his best hockey to help Boston bring home the Cup

PREDICTION
Logan: Bruins in six.

It wouldn’t be surprising if this one goes seven, but six seems more likely. Either way, these teams are going to beat the bejesus out of each other and it should be a plenty entertaining series.

Lauren: Bruins in six.

Boston’s experienced core and Rask’s hot play ultimately will be the deciding factor in a pretty evenly matched series. It won’t be easy and it probably will be physical, but it will be the Bruins who hoist Lord Stanley in the end.

Thumbnail photo via Joe Puetz/USA TODAY Sports Images