The Stanley Cup Final heads back to Vegas with Carolina up 3-2, and the two teams left standing are a natural experiment in how to build a winner. Carolina has spread its 63 goals across 14 different scorers; its top two finishers, Logan Stankoven and Jordan Staal, account for just 30% of the offense. Vegas is a star vehicle: Brett Howden and Pavel Dorofeyev have driven 34% of the goals, and the supporting cast fills in around them. And on the factor that usually settles a series, they are dead even. Frederik Andersen is stopping pucks at .910 this postseason (Brandon Bussi has taken the Helm in Games 4 & 5), Carter Hart at .909, and Hart has faced 261 more shots to get there.

So, which build wins? This week I went looking for the long answer.

All the numbers in this piece are pulled from the NHL API: every playoff box score since 1987, the first season every round went best-of-seven, covering all 584 completed series through Game 5 of this Final. For each series, I compared the winner and the loser on goaltending, scoring balance, special teams, and blue-line offense. The answer depends on which of two questions you are asking, and almost everyone mixes them up. What does winning look like after the fact? And what could you actually have known beforehand?

The Goalie Decides the Series. You Just Can’t Know Which Goalie.

Start with the cliché, because it is true. The team that got the better goaltending in a series — the higher save percentage across those four to seven games — won 81.7% of the 584 series. Nothing else is close. A save percentage edge of just 10 points, .910 against .900, more than doubles a team’s odds of advancing. And the hot-goalie requirement for a championship is nearly absolute: 34 of the 38 Cup winners since 1987 had above-median playoff goaltending, and the typical champion’s netminder finished in the 75^th percentile of his postseason.

Two things complicate the cliché. First, goaltending’s grip is loosening, and the slide has been steady. Decade by decade, the better-goaltending team has won 85% of series, then 84, then 79, then 78 over the last ten springs. Still dominant, but the modern playoffs are measurably less of a goalie duel than the ones Patrick Roy played in.

Second, and this is the part that matters for anyone filling out a bracket: you cannot see it coming. The team with the better regular-season save percentage wins only 53-55% of playoff series, barely better than a coin flip. October-through-April goaltending tells you almost nothing about who gets the saves in May. The goalie decides the series. The regular season does not tell you which goalie it will be.

Depth Is What Winning Looks Like, Not What You Can Bet On

Brett Howden is the thesis of this section in one player. Twelve goals in 58 regular-season games, a penalty-kill center by trade, and he leads these playoffs with 14. Nobody drafted that. Nobody could have.

Because here is the strongest pattern in the whole dataset: series winners got their goals from 10.0 different skaters on average, losers from 8.4. Winners’ top two scorers accounted for 38.8% of their goals; losers’ top two carried 42.7. Slice it any way you like — top three point share, the number of different goal scorers, how evenly the points spread across the lineup — playoff series winners share the scoring, and the effect is enormous.

Champions are the extreme case, and the pattern holds in every single decade. Cup winners’ top two scorers have produced roughly 30 to 32% of their team’s playoff goals in every era since 1987, while the teams they eliminated sat between 37 and 42. That is true even in the Wayne Gretzky and Mario Lemieux years. The dynasties we remember as star vehicles were, by the distribution of their actual goals, the most balanced teams in their brackets. The most top-heavy champion of the era was the 2004 Tampa Bay Lightning, who rode two scorers to 40% of their goals. The most democratic were the 1998 and 2002 Detroit Red Wings and the 2016 Pittsburgh Penguins, all near 25.

Now the turn: none of this is predictive. Take each team’s regular-season scoring balance and ask whether the more depth-driven team goes on to win the series, and the answer is 49.1%. Nearly a literal coin flip. Depth scoring is not a roster trait that wins in the spring; it is something winning runs produce. A fourth-liner gets hot, a checking center starts finishing, and afterward we call it depth. Howden was not depth in March. He is depth now. Carolina’s 14-scorer spread is what a championship run looks like while it is happening — it is not evidence the Hurricanes were built to do this, and Vegas’ top-heavy profile is not evidence they weren’t.

Build the Penalty Kill, Not the Power Play

If you want a special-teams edge you can actually bank, it is on the short side of the puck. The team with the better regular-season penalty kill has won 55.9% of playoff series since 1987, the most reliable predictor in the data after raw team quality, and the signal holds across eras. The team with the better regular-season power play? 51.6%. Noise. It fails every statistical test, in every decade.

The in-series numbers explain why the power-play mirage persists. Series winners do score more power-play goals — they out-score the loser on the man advantage in about 62% of series — but their power-play share of total goals (26.2%) is near-identical to the losers' (27.2%). Winners are not winning on the power play. They are scoring more of everything, and the power play comes along for the ride.

One more roster myth while we are here: blue-line offense. Defensemen have produced a flat 16-17% of playoff goals in every era for forty years, and series winners actually get less of their offense from the back end than losers do, 15.1 versus 16.7%. Winning playoff offense runs through forwards. It always has.

What You Can Actually Know in Advance

Rank everything you could know about two teams before a series starts by how often the “better” team advances:

Regular-season trait: More points

Better team wins the series: 60.4%

Regular-season trait: Better penalty kill

Better team wins the series: 55.9%

Regular-season trait: Better goaltending

Better team wins the series: 53-55%

Regular-season trait: Better power play

Better team wins the series: 51.6%

Regular-season trait: More balanced scoring

Better team wins the series: 49.1%

That first line is the entire sport in one number. The favorite, defined the simplest possible way as more regular-season points, wins six series out of ten. A 16-team bracket where the favorite wins 60% of the time produces chaos by design, and everything below “just be the better team” is nearly invisible in advance.

This spring fits the pattern. Favorites went 8-4 in series between teams with different point totals, chalkier than the 39-year norm but nothing historic. And the bracket still produced one of the biggest upsets of the entire era — only nine series in 39 years featured a larger points gap: 95-point Vegas did not just beat 121-point Colorado, they swept them. Short series and predictable series are not the same thing.

Game 6 is a Referendum on the Recipe

The Final gives us a clean test. If Carolina closes it out, the textbook holds: the better team at 113 points to 95, the deeper scoring spread, and one of the most balanced championship runs of the modern era. If Vegas takes two, a 95-point team with star-concentrated scoring lifts the Cup, and the 18-point gap ties the 1995 Devils over the Red Wings for the largest Final upset of the 39-year era — and that one came in a lockout-shortened season.