2026 Holland Series
Best of 7
Neptunus
59.7%
Amsterdam
40.3%
/ StatPredict · 500,000 simulations · 4 September 2026
The expected final, without an obvious ending.
Neptunus vs Amsterdam. Best of seven. First to four wins.
The two clubs separated themselves from the Hoofdklasse field, then reached the final through very different semifinals. Rotterdam is favored at 59.7%, but one Amsterdam win in Game 1 would reverse the series line.
Most likely result
NEP 4-2
A six-game Neptunus win is the center of the final forecast.
Long-series chance
61.5%
The model expects Game 6 or Game 7 more often than an early finish.
Expected pairing
69.2%
This exact final was already the primary bracket before either semifinal.
Game 1 swing
+16.9 pts
An Amsterdam opener win moves its series chance from 40.3% to 57.2%.
/ Forecast path
The destination stayed stable. The title split moved.
Neptunus remained the favorite at every checkpoint. Amsterdam's 23-6 semifinal sweep recovered much of the equity that disappeared when the final bracket was fixed.
Three forecast checkpoints
The finalists were the model's primary pairing before the bracket began. The September update changes the title split, not the identity of the favorite.
30 July
52.5 / 41.7
NEP / AMS title chance
Nine regular-season games remained
The model already centered the season on Neptunus and Amsterdam, with a 70.6% chance of this final.
20 August
60.9 / 32.7
NEP / AMS title chance
The semifinals were fixed
Neptunus carried the clearer route. The exact final still held 69.2% of the bracket.
4 September
59.7 / 40.3
NEP / AMS title chance
Both finalists confirmed
Amsterdam's sweep closed the gap without displacing the season-long favorite.
/ Team files
Two elite profiles, one wider safety margin
Both offenses clear the .371 league wOBA. Neptunus stays ahead because the run-prevention record, staff FIP and potential fourth home game all point in the same direction.
Completed schedule plus semifinals
Neptunus carries the larger scoring margin. Amsterdam remains close enough that its cleaner semifinal meaningfully narrows the final.
Direct metric comparison
The gaps are narrow, but all four completed-season indicators lean toward Rotterdam.
NEPAMS
Team wOBA
.427
.416
Staff FIP
3.82
3.93
Run diff / game
+4.90
+3.77
Season PFI
6.08
5.65
Four possible Rotterdam home games add a small venue edge to an already narrow statistical lead.
Rotterdam
Curaçao Neptunus
59.7%
Record
35-4-1
Run line
278-82
wOBA
.427
Staff FIP
3.82
Diff / game
+4.90
Season PFI
6.08
The favorite owns the stronger run-prevention record, the slightly deeper offense and 4 possible home games. Its advantage is cumulative – not just in one category.
Semifinal route
L 2-7W 2-1W 5-0W 9-1
Recovered after losing Game 1, then allowed two runs across the next three games.
Lineup leaders
Stijn van der Meer
.517 wOBA · top-five bat
Darryl Collins
.512 wOBA · .667 SLG in SF
Chris Diaz
.509 wOBA · middle-order depth
Rotation core
Juancarlos Sulbarán
3.08 FIP · 68.0 IP
Koen Postelmans
3.31 FIP · 66.2 IP
Shairon Martis
3.53 FIP · 80.0 IP
Winning pattern
Build traffic throughout the order, force Amsterdam to expose its bullpen plan early and let the three-man rotation control the recovery windows.
Amsterdam
Amsterdam Pirates
40.3%
Record
33-6
Run line
255-108
wOBA
.416
Staff FIP
3.93
Diff / game
+3.77
Season PFI
5.65
Amsterdam arrives with the cleaner semifinal and the top-of-order quality to erase a narrow single-game disadvantage. It does not need the series to become chaotic.
Semifinal route
W 8-1W 9-4W 6-1
Swept Oosterhout Twins 3-0 and won the series by a combined 23-6.
Lineup leaders
Jeandro Tromp
.547 wOBA · .533 OBP in SF
Tommy van de Sanden
.514 wOBA · season
Delano Selassa
.479 wOBA · season
Rotation core
Pim Vijfvinkel
3.24 FIP · 32.1 IP
Lars Huijer
3.64 FIP · 81.1 IP
Martijn Schoonderwoerd
3.83 FIP · rotation
Winning pattern
Win the first leverage game, shorten Neptunus starts and protect four six-inning pitching performances before Rotterdam's depth can take over.
/ Amsterdam route
Game 1 can turn 40.3% into control
The Pirates do not need a vague upset. Their route is measurable: take the first leverage game, shorten the Neptunus starts and make four leads survive six innings.
Amsterdam's opening leverage
Game 1 is not exploratory. One result can move the Pirates from a live underdog to the series favorite before Game 2.
01
Spend leverage now
A Game 1 win lifts Amsterdam to 57.2%. A loss cuts the route to 26.6%, so the first close late inning deserves the best available arm.
02
Shorten the starters
Long plate appearances matter before power. The goal is to prevent Sulbarán, Postelmans or Martis from carrying the game directly into the eighth.
03
Protect six innings
Huijer, Vijfvinkel and Schoonderwoerd do not need complete games. They need four starts that avoid an early deficit and hand over a defendable score.
04
Remove free bases
Amsterdam's cleanest route is a controlled game where one swing or one bullpen decision matters more than nine open innings of offense.
/ Head to head
Six meetings produced a split, not a permanent pattern
Neptunus won the aggregate 31-20, but ten runs of that margin came from the first game. Amsterdam answered with three wins, including both a 3-0 control game and an 8-7 finish in Rotterdam.
Neptunus
3
wins · 31 runs
Amsterdam
3
wins · 20 runs
Regular-season ledger
28 May
NEP 11-1 AMS
30 May
AMS 3-0 NEP
30 May
AMS 6-4 NEP
30 Jul
NEP 6-2 AMS
1 Aug
NEP 3-0 AMS
1 Aug
AMS 8-7 NEP
Four of the final five meetings were decided by four runs or fewer. The matchup has already moved between blowout, shutout and one-run forms.
/ Pressure map
Four moments can redraw the series
The final is less about finding one hidden mismatch than controlling when the strongest starters, deepest innings and most fragile defensive moments arrive.
01
The first 18 innings
Games 1 and 2 are played on consecutive days in different cities. A split preserves balance; a sweep immediately changes who must chase.
02
Access to the bullpens
Turning a six-inning start into four changes more than one game. It also reshapes the opponent's availability for the next date.
03
Free bases
Both lineups already create elite on-base value. Walks, hit batters and failed defensive conversions make the next plate appearance harder to escape.
04
The Game 5 pivot
At 2-2, Neptunus returns home for a best-of-three. At 3-1 Amsterdam, Rotterdam must win three straight while the Pirates need one protected start.
/ Series calendar
Seven dates, four decision windows
The venues alternate throughout the final. Grouping the schedule by recovery window makes the pitching implications clearer than seven repeated game cards.
Scoring center · Rotterdam
Games 1, 3, 5 and 7
Neptunus
7.8
Amsterdam
6.9
Game-level favorite
Neptunus 55.2%
Scoring center · Amsterdam
Games 2, 4 and 6
Neptunus
7.7
Amsterdam
7.0
Game-level favorite
Neptunus 53.5%
Opening switch
G1
5 Sep · 14:00
Rotterdam
G2
6 Sep · 14:00
Amsterdam
Two games in two cities before the first recovery window.
Thursday night
G3
10 Sep · 19:30
Rotterdam
A standalone night game puts the front of each rotation back at the center.
Second weekend
G4
12 Sep · 14:00
Amsterdam
G5if needed
13 Sep · 13:00
Rotterdam
The venue edge switches overnight before a possible 2-2 pivot.
Decision weekend
G6if needed
19 Sep · 14:00
Amsterdam
G7if needed
20 Sep · 13:00
Rotterdam
If the series lasts, each club gets one final home date.
The scoring centers are model averages within each venue, not literal final-score predictions. Data through 3 September 2026.
Official schedule and results/ Final call
Neptunus is the pick. Amsterdam can change it immediately.
The 59.7% forecast is a refinement of the original Neptunus position, not a new favorite selected after the finalists became known.
59.7%
StatPredict selection
Curaçao Neptunus
A slightly stronger offense, slightly stronger staff FIP and four possible home games keep the season-long favorite ahead.
40.3%
Live challenger
Amsterdam Pirates
A 3-3 season split, a 23-6 semifinal sweep and a 57.2% line after a Game 1 win make the resistance specific.
Most likely exact result
Neptunus 4-2
Game 6 or 7 · 61.5%
/ Related reports
Follow the model from open bracket to final
The July HDK projection preserves the original field forecast; the Czech and German reports show the same model adapting to different postseason structures.
30 July · HDK
The playoff projection
The original four-team forecast that centered Neptunus and Amsterdam before the bracket was complete.
4 September · CEX
Czech Series preview
Kotlářka versus Hroši through the exact-result distribution, team profiles and seven-game route.
Germany · DBL
Semifinal forecast
Three sweeps, one comeback and an updated path through the German bracket.
Holland Series intelligence
Prepare for the game after the probability moves
Statbase connects opponent tendencies, rotation availability, player form and series leverage so clubs can prepare beyond one headline percentage.
140 games
inside the current HDK scope
9,959 PA
reconciled across the season
7 game slots
mapped through the final