# Series Winner: Philadelphia (7) vs Boston (2)

PHI vs BOS (R1 - 2026)

Updated: April 22, 2026

Category: Sports

Tags: Basketball

HTML: /markets/sports/basketball/series-winner-philadelphia-7-vs-boston-2/

## Short Answer

**Key takeaway.** Both the **model** and the **market** overwhelmingly agree that Boston is most likely to win the series against Philadelphia, with only minor residual uncertainty.

## Key Claims (January 2026)

**- - Philadelphia won Game 2, tying the series despite Joel Embiid's absence.** - This unexpected victory demonstrated Philadelphia's resilience against higher seed Boston.
- Boston decisively won Game 1 by 32 points with Jayson Tatum available.
- Joel Embiid's continued absence remains a key challenge for Philadelphia.
- Philadelphia's bench displayed significant depth with a positive Net Rating.

### Why This Matters (GEO)

- AI agents extract claims, not arguments.
- Improves citation probability in summaries and answer cards.
- Enables fact stitching across multiple sources.

## Executive Verdict

**Key takeaway.** **Model** sees **21%** **probability** vs 16c **market** price, implying a 5pp gap and a 6.2x payout multiple.

### Who Wins and Why

| Outcome | Market | Model | Why |
| --- | --- | --- | --- |
| Boston | 86.0% | 79.0% | Market higher by 7.0pp |
| Philadelphia | 16.0% | 21.0% | Model higher by 5.0pp |

## Model vs Market

| Outcome | Market Probability | Octagon Model Probability |
| --- | --- | --- |
| Boston | 86.0% | 79.0% |
| Philadelphia | 16.0% | 21.0% |

- Expiration: May 17, 2026

## Market Behavior & Price Dynamics

This market, which predicts a series win for Philadelphia, has experienced a general upward trend since its inception. The price opened at a 10.0% probability and has since climbed to a current high of 16.0%. The most significant event in the chart's history is a recent and dramatic 12.0 percentage point spike on April 22, 2026. On that day, the implied probability of a Philadelphia victory jumped from a low of 4.0% to its current price of 16.0%. The cause for this sudden and substantial re-pricing is not apparent from the available context.

The total traded volume of 432,382 contracts indicates a high level of interest in this market. However, the volume pattern during the price spike is notable; the significant price increase on April 22 occurred on relatively light volume compared to other periods. This may suggest that the move was not driven by broad market participation but rather by a smaller number of transactions. In terms of key price levels, the new high of 16.0% acts as a potential resistance point. The previous low around 3.0%-4.0% served as a short-term support base before the breakout. Overall, the chart indicates a sharp, recent shift in sentiment favoring Philadelphia, though the conviction behind this new price level is tempered by the low-volume nature of the spike.

## Significant Price Movements

#### 📈 April 22, 2026: 12.0pp spike

Price increased from 4.0% to 16.0%

**Outcome:** Philadelphia

**What happened:** No supporting research available for this anomaly.

## Contract Snapshot

This market resolves to Yes if Boston wins the Philadelphia vs Boston 1st Round series in the 2026 Pro Basketball playoffs, and to No if Boston does not win, as the event is mutually exclusive. The market closes when a winner is declared, or by May 17, 2026, 1:00pm EDT, with payouts projected 5 minutes after closing. Resolution relies on sources from the Governing League (nba.com), Fox Sports, and ESPN.

## Market Discussion

The market heavily favors Boston to win the series with an 84% probability, despite the series currently being tied 1-1. Traders supporting Boston anticipate wins in 5 games or even a 4-game sweep. Conversely, a minority of traders believe Philadelphia will ultimately prevail.

## Market Data

| Contract | Yes Bid | Yes Ask | Last Price | Volume | Open Interest |
| --- | --- | --- | --- | --- | --- |
| Boston | 85% | 86% | 86% | $548,403.81 | $479,396.62 |
| Philadelphia | 14% | 15% | 16% | $432,621.89 | $295,055.75 |

## How Did Player Availability Affect Celtics-76ers Game 1 and Market?

Jayson Tatum Status for Game 1 | Available and played [[^]](https://sports.yahoo.com/articles/sixers-face-celtics-team-everyone-181501008.html) |
Joel Embiid Status for Game 1 | Out due to injury [[^]](https://sixerswire.usatoday.com/story/sports/nba/sixers/2026/04/18/full-injury-report-for-joel-embiid-sixers-vs-celtics-in-game-1/89676995007/) |
Philadelphia Market Spike | 12-point price spike on April 22, 2026 [[^]](https://www.aol.com/articles/joel-embiid-cheers-76ers-game-032557998.html) |

**Jayson Tatum played, while Joel Embiid was out for Game 1**

Jayson Tatum played, while Joel Embiid was out for Game 1. For Game 1 of the Celtics-76ers series in 2026, Boston's Jayson Tatum was officially available and played, with the Celtics having their full roster ready for the game [[^]](https://sports.yahoo.com/articles/sixers-face-celtics-team-everyone-181501008.html). The Celtics secured a victory with a score of 123-91 on April 20, 2026 [[^]](https://www.espn.com.sg/nba/boxscore/_/gameId/401869191). In contrast, Philadelphia's Joel Embiid was officially designated as "Out" due to injury for Game 1 [[^]](https://sixerswire.usatoday.com/story/sports/nba/sixers/2026/04/18/full-injury-report-for-joel-embiid-sixers-vs-celtics-in-game-1/89676995007/). Reports indicated he was not expected to play in the initial games of the series [[^]](https://sports.yahoo.com/nba/article/do-the-76ers-have-a-chance-against-the-celtics-if-they-prolong-the-series-and-get-joel-embiid-back-060436925.html), and his absence in the early stages was further confirmed when he was observed cheering on the 76ers from the sidelines in Game 2 [[^]](https://www.aol.com/articles/joel-embiid-cheers-76ers-game-032557998.html).

Philadelphia's **market** spike aligns with their Game 2 victory. The confirmed playing status for Game 1—with Jayson Tatum active and Joel Embiid sidelined—and Philadelphia's subsequent 32-point loss [[^]](https://www.espn.com.sg/nba/boxscore/_/gameId/401869191) would typically not align with the **market**'s 12-point price spike for Philadelphia on April 22, 2026. However, by April 22, 2026, the 76ers had also played Game 2 and secured a win, tying the series 1-1, despite Embiid's continued absence [[^]](https://www.aol.com/articles/joel-embiid-cheers-76ers-game-032557998.html). This demonstrated resilience and ability to compete without their star player, coupled with potential anticipation of Embiid's eventual return later in the series [[^]](https://sports.yahoo.com/nba/article/do-the-76ers-have-a-chance-against-the-celtics-if-they-prolong-the-series-and-get-joel-embiid-back-060436925.html), could have led to a revised, more optimistic **market** assessment for Philadelphia, thereby aligning with a price spike two days after Game 1.

## Can Porzingis's Offensive Rating Against Embiid in Drop Coverage Be Found?

Specific Defensive Matchup Data | Not available for Porziņģis vs. Embiid in drop coverage (ESPN [[^]](https://www.espn.go.com/nba/boxscore/_/gameId/401810729), Basketball-Reference.com [[^]](https://www.basketball-reference.com/boxscores/202510310PHI.html)) |
Granular Play-by-Play Data | Required data not provided by public web research for specific conditions [[^]](https://www.nba.com/news/2026-nba-playoffs-series-preview-celtics-76ers) |
Advanced Player Tracking Specificity | Beyond the scope of available sources for isolating defensive schemes [[^]](http://www.cleaningtheglass.com/stats/game_detail?game=248467083) |

**The requested statistical breakdown cannot be determined from available web research**

The requested statistical breakdown cannot be determined from available web research. It is not possible to determine Boston's offensive rating and effective field goal percentage (eFG%) specifically during possessions where Kristaps Porziņģis was on the floor and Joel Embiid was the primary defender in drop coverage during the 2025-2026 regular season matchups. The provided sources lack the granular play-by-play data necessary to isolate possessions based on a specific defensive scheme and primary defender matchup.

Existing sources offer broad statistics but lack specific defensive detail. Traditional box score statistics for the 2025-2026 regular season matchups are available from platforms such as ESPN [[^]](https://www.espn.go.com/nba/boxscore/_/gameId/401810729) and Basketball-Reference.com [[^]](https://www.basketball-reference.com/boxscores/202510310PHI.html), covering games like October 31, 2025 [[^]](https://www.basketball-reference.com/boxscores/202510310PHI.html) and March 1, 2026 [[^]](https://www.espn.go.com/nba/boxscore/_/gameId/401810729). However, these platforms do not track or report advanced metrics under the highly specific conditions of a particular defensive coverage against an individual player. Similarly, advanced statistical platforms like Cleaning the Glass [[^]](http://www.cleaningtheglass.com/stats/game_detail?game=248467083) offer comprehensive team and player statistics, including offensive rating and eFG% for on-court/off-court splits for players such as Kristaps Porziņģis [[^]](http://www.cleaningtheglass.com/stats/game_detail?game=248467083). Despite this, these platforms do not filter statistics by the opponent's specific defensive coverages, such as Joel Embiid in drop coverage, against individual players. For instance, the game on November 11, 2025, is covered by Cleaning the Glass [[^]](http://cleaningtheglass.com/stats/game_detail?game=248466369).

Highly detailed player tracking data would be required to answer this question. This data would need to identify specific defensive assignments and schemes on a play-by-play basis. Such a level of specificity is beyond the scope of the provided public web research results, which primarily include game summaries, box scores, general advanced team and player statistics, and analytical articles [[^]](https://www.nba.com/news/2026-nba-playoffs-series-preview-celtics-76ers).

## Why Is Betting Data for Future Sports Events Unavailable?

Data Availability for April 22, 2026 Series | Not available [[^]](https://www.actionnetwork.com/nba/sharp-report) |
Reason for No Data | No lines posted or wagers placed yet [[^]](https://www.sportsbettingdime.com/nba/public-betting-trends/) |
Typical Data Coverage by Services | Real-time and historical splits for ongoing/recent events [[^]](https://www.actionnetwork.com/nba/sharp-report) |

**No 'sharp' versus 'public' money data exists for the 2026 NBA series**

No 'sharp' versus 'public' money data exists for the 2026 NBA series. The requested data regarding the percentage of 'sharp money' versus 'public money' for the Philadelphia vs. Boston series winner **market** on April 22, 2026, is currently unavailable. This is primarily because major sportsbooks have not yet opened betting lines for an event scheduled so far in the future, meaning no wagers have been placed. Without active betting, it is impossible to calculate any distribution of 'sharp' versus 'public' money [[^]](https://www.sportsbettingdime.com/nba/public-betting-trends/).

Betting analytics services only cover active or recently concluded markets. Professional betting analytics services, such as The Action Network and VSiN, along with major sportsbooks like DraftKings, do provide comprehensive real-time and historical betting splits, which indicate money and bet ticket distribution. However, these services are specifically designed to report on active or recently concluded games and series [[^]](https://www.actionnetwork.com/nba/sharp-report). They are not equipped to generate or report detailed betting data for future events, especially those two years away, that do not yet have established betting markets.

## How Did Boston's and Philadelphia's Benches Compare in 2025-26?

Boston Bench Net Rating | +4.1 (final 15 games 2025-2026 season) [[^]](https://www.espn.com/nba/team/stats/_/name/boston/table/game/sort/avgMinutes/dir/desc) |
Philadelphia Bench Net Rating | +2.5 (final 15 games 2025-2026 season) [[^]](https://screwball.com/nba/philadelphia-76ers/bench-stats-in-2026) |
Philadelphia Non-Starters Minutes | 1,250 minutes (final 15 games 2025-2026 season) [[^]](https://screwball.com/nba/philadelphia-76ers/bench-stats-in-2026) |

**During the final 15 games of the 2025-2026 NBA regular season, Philadelphia's bench unit showed depth with a positive Net Rating**

During the final 15 games of the 2025-2026 NBA regular season, Philadelphia's bench unit showed depth with a positive Net Rating. The 76ers' non-starters logged a significant 1,250 minutes of play during this period and achieved a Net Rating of +2.5, demonstrating a reliance on their bench depth [[^]](https://screwball.com/nba/philadelphia-76ers/bench-stats-in-2026).

Boston's bench unit achieved a higher Net Rating with less playtime over the same 15-game stretch. The Celtics' bench unit recorded a superior Net Rating of +4.1, statistically outperforming Philadelphia's [[^]](https://www.espn.com/nba/team/stats/_/name/boston/table/game/sort/avgMinutes/dir/desc). Boston's non-starters contributed 1,100 minutes of play, fewer than their Philadelphia counterparts, suggesting that the Celtics' bench was more efficient with its playing time despite less overall usage [[^]](https://www.espn.com/nba/team/stats/_/name/boston/table/game/sort/avgMinutes/dir/desc).

## What is the 2026 Celtics vs. 76ers playoff schedule?

Series Dates | April 19 to May 3, 2026 [[^]](https://www.nba.com/playoffs/2026/east-first-round-2) |
NBA Win Rate - 1 Day Rest | 51.5% [[^]](https://www.atsstats.com/how-nba-teams-perform-on-different-days-of-rest/) |
NBA Win Rate - 3+ Days Rest | 53.6% [[^]](https://www.atsstats.com/how-nba-teams-perform-on-different-days-of-rest/) |

**The 2026 Celtics-76ers series is scheduled from April 19 to May 3**

The 2026 Celtics-76ers series is scheduled from April 19 to May 3. The Eastern Conference First Round series between the Boston Celtics and Philadelphia 76ers in 2026 is set to occur from April 19 to May 3, with game locations alternating between Boston and Philadelphia [[^]](https://www.nba.com/playoffs/2026/east-first-round-2). The series commences in Boston with Game 1 on April 19, followed by Game 2 on April 21. Subsequently, the series moves to Philadelphia for Game 3 on April 24 and Game 4 on April 26. If the series extends, Game 5 would return to Boston on April 29, Game 6 would be in Philadelphia on May 1, and a decisive Game 7 would take place in Boston on May 3 [[^]](https://www.nba.com/playoffs/2026/east-first-round-2). Travel between Boston and Philadelphia covers approximately 300 miles and is not classified as "cross-country" [[^]](https://www.nba.com/playoffs/2026/east-first-round-2).

NBA team win rates vary with days of rest. Historically, general NBA team performance in playoff games shows variations in win rates depending on the number of rest days between contests [[^]](https://www.atsstats.com/how-nba-teams-perform-on-different-days-of-rest/). Teams generally achieve a **51.5%** win rate after one day of rest, which slightly declines to **50.8%** with two days of rest. However, performance tends to improve with longer breaks, as teams record a **53.6%** win rate when they have three or more days of rest [[^]](https://www.atsstats.com/how-nba-teams-perform-on-different-days-of-rest/). The research does not provide specific historical playoff win percentages for either the Boston Celtics or the Philadelphia 76ers, broken down by rest days, that also account for the impact of travel between these two specific cities [[^]](http://loganssportsratings.blogspot.com/2021/06/rest-vs-rust-in-nba-playoffs.html).

## What Could Change the Odds

**Key takeaway.** Catalyst analysis unavailable.

## Key Dates & Catalysts

- **Expiration:** May 17, 2026
- **Closes:** May 17, 2026

## Decision-Flipping Events

- Catalyst analysis unavailable.

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## Historical Resolutions

No historical resolution data available for this series.

## Disclaimer

This content is for informational and educational purposes only and does not constitute financial, investment, legal, or trading advice.
Prediction markets involve risk of loss. Past performance does not guarantee future results.
We are not affiliated with Kalshi or any prediction market platform. Market data may be delayed or incomplete.

### Data Sources & Model Transparency

**Data Sources:** Octagon Deep Research aggregates information from multiple sources including news, filings, and market data.

**Freshness:** Analysis is generated periodically and may not reflect the latest developments. Verify critical information from primary sources.