Ron Chenoy-USA TODAY Sports

The Stanley Cup Final has shown that teams with bigger defensemen have a bigger advantage. The Pittsburgh Penguins’ defense pales compared to the Vegas Golden Knights and even the blue line crew that new president Kyle Dubas built with the Toronto Maple Leafs over the past six seasons.

For comparison, the Vegas blue line has six defensemen at least 6 feet and 200 pounds (Shea Theodore might be a pound or two under 200, but the point stands).

Even Toronto had five of six who met the criteria and a sixth who is close.

This summer, the Penguins figure to lose their second-biggest defenseman, Brian Dumoulin. It’s not a guarantee that Dumoulin will leave via free agency, but his inconsistent performance this season, born of knee surgery last spring, doesn’t make him a good long-term investment, even at 31 years old.

Coach Mike Sullivan replaced him for a spell as a top pairing defenseman beside Kris Letang, using Marcus Pettersson and infrequently P.O Joseph. Still, that spot has been Dumoulin’s as faithfully as Chewy beside Han for about five years.

The left side of the Penguins’ defense is, to be generous, slight. Pettersson is 6-foot-3 but 178 pounds. Joseph is listed as 185 pounds. Dumoulin was the only left-side defender with enough size to withstand the battles at the net for 82 games.

With free agency set to begin July 1, the Penguins have about $20 million to replace their departing free agents, which may include Dumoulin, Jason Zucker, and Tristan Jarry.

Dumoulin made just over $4 million this season, which should allow Dubas to look at some better defensemen. However, there is a problem.

Replacing Dumoulin won’t be that easy.

There are very few left-handed defensemen on the UFA market, especially those who could fill a top defensive role and have the size to back it up. Also, they would have to fit into the Penguins’ salary cap structure. They could use Dumoulin’s $4 million or a little more to replace him, but chasing a marquee UFA like Dmitry Orlov won’t fly.

On the coming free agent market, by our count, there is Dumoulin and … only two others.

Houston, we have a problem.

There are several players at the end of their careers whose names might leap off the page, but their recent play has not. Erik Johnson, Ian Cole, and Calvin de Haan have seen better days.

Boston Bruins defenseman Connor Clifton might seem a possibility, but he often plays on the right and is too prone to the “oh boy” type brain farts that get defensemen benched. See Game 6 against Florida.

And so, the effort to replace Dumoulin could be down to bringing back Dumoulin, New York Islanders d-man Scott Mayfield, or big New Jersey Devils defenseman Ryan Graves.

Mayfield suffers from some of the same drawbacks as Dumoulin is developing. He’s a bit slow, and opponents can get the edge.

However, he’s also 6-foot-5, doesn’t mind getting his nose dirty, and will stand up for teammates. He does those things better than Dumoulin and may not cost as much. Mayfield isn’t necessarily a top-pair defenseman but could be a second-pairing guy, shoving Pettersson to the top role full-time.

Graves, who is 6-foot-5, 220 pounds, can be a genuine shutdown defenseman. However, the 28-year-old might see a healthy raise on last season’s $3.16 million AAV. If there’s a UFA get for the Penguins to replace Dumoulin, it’s Graves by a mile.

But the salary cap is still a thing.

With some irony, the dark horse on the free agent market could be Dmitry Kulikov. The Penguins acquired him from the Anaheim Ducks at the NHL trade deadline, but he played only six games because of injury.

Alas, we barely knew thee.

Kulikov has been a hockey vagabond for six years. Since his seven seasons with Florida, followed by three with Winnipeg, he’s played for five teams in five years.

Penguins coach Mike Sullivan seemed to like him a great deal. His tone was optimistic, and Kulikov was immediately inserted into the Penguins’ lineup in a top-four role.

Perhaps he’s the budget fallback.

However, this summer, the free agent market is not a bumper crop for LHDs. So, if the Pittsburgh Penguins and Dubas were banking on free agency for a Dumoulin replacement, they might need to look for a trade instead.

More must-reads:

TODAY'S BEST
Xander Schauffele tops stacked leaderboard after first round of Wells Fargo Championship
Rangers center making long-awaited return in Game 3 vs. Hurricanes
Suns talks with head-coaching target 'expected to move quickly'
Knicks get even more bad injury news ahead of Game 3
Frank Vogel fell victim to a Suns ownership group eager to win
2008 Celtics champion sentenced to prison despite emotional plea
Skip Bayless makes huge Tom Brady prediction after Netflix roast
14-year-old phenom signs unprecedented MLS deal that includes future Man City transfer
Pacers coach claims officials are biased against 'small market' teams
Hall of Famer makes bold prediction about Russell Wilson, Steelers
49ers Hall of Fame CB Jimmy Johnson dies
Rams make surprising move with former team captain
NBA announces discipline for Bucks' Patrick Beverley
Hall of Fame RB defends Najee Harris after Steelers decline fifth-year option
Pacers file shocking number of questionable calls after Game 2 loss vs. Knicks
Former NBA star says Anthony Edwards becomes face of the NBA if Wolves knock off Nuggets
Hornets hire top Celtics assistant as next head coach
Maple Leafs fire HC Sheldon Keefe after another early playoff exit
Super Bowl champion discusses why Russell Wilson failed with Broncos
Colts LB Zaire Franklin calls out Texans, C.J. Stroud

Want more sports news?

Join the hundreds of thousands of fans who start their day with Yardbarker's Morning Bark, the best newsletter in sports.