Posted Line Trajectory: Trending Down (-1.0 over 6 games)Settled / Live Release · Full Dossier Unlocked

Stephon Castle Assists Prop (Dallas Mavericks @ San Antonio Spurs, Nov 4, 8:30 PM CT): Fair Line 5.3 (-114) vs 5.5 Market

Name: Stephon Castle Posted Assists Line Trajectory & DAL @ SAS Nucleus Drift
Creator: WagerBird Quantitative Research Desk
Published: 2026-11-04T10:48:04+00:00

By WagerBird Quantitative Research Desk · SkyBurst Technology, Inc. (NJ DGE Vendor #0096475) · Released Wed, Nov 4, 4:48 AM CT · Last updated (CT) Sat, Nov 7, 10:56 AM CT

FanDuel: Under 5.5 (+115)Modeled Edge: +13.8% EV · Fair Value 5.3 (-114)

Pick & Release Line: UNDER 5.5 (-142); FanDuel
Modeled Fair Line: 5.3; 0.2 Pt Delta
Modeled Fair Price: -114; +13.8% EV
Posted Line Drift: 6.5 → 5.5 (-1.0); Last 6 Active Games
Matchup (CT): DAL @ SAS; Nov 4, 8:30 PM CT
NBA Props Lane CLV: 73 / 11 / 36; Beat / Tied / Lost

Sportsbook Posted Assists Line Trajectory (Last 6 Active Games)

Pre-game sportsbook posted assists total each game vs. WagerBird Modeled Fair Line.

Posted Book Line WagerBird Fair (5.3 / -114)

Trajectory Readout: Across the last 6 active games (Oct 24 to Nov 4), sportsbooks adjusted Stephon Castle's posted assists line downward in 1 of 5 game-over-game steps from 6.5 to 5.5 (-1.0). WagerBird's modeled fair line for DAL @ SAS is 5.3 (-114).

6-Game Posted Assists Ledger (Stephon Castle)

America/Chicago (CT)

Date (CT)	Matchup	Posted Line	Move	Actual	Result
Oct 24	SAS @ DAL	6.5 (+130)	—	8	Over
Oct 27	SAC @ SAS	6.5 (+102)	0.0	5	Under
Oct 28	SAS @ UTA	6.5 (+114)	0.0	8	Over
Oct 31	MIN @ SAS	5.5 (-118)	-1.0	4	Under
Nov 2	UTA @ SAS	5.5 (-134)	0.0	4	Under
Nov 4	DAL @ SAS	5.5 (-142)	0.0	3	Under

Canonical pre-game posted line across 5 licensed partner sportsbooks. Missing or uncaptured feed values always render —.

Compare Licensed Partner Books: Execute or compare live quotes and prediction markets (Kalshi code WBIRD1).

FanDuel: Under 5.5 (+115)DraftKings: Under 6.5 (+115)BetMGM: Under 5.5 (+115)Caesars: Under 5.5 (+115)Trade on Kalshi · Code: WBIRD1

Sticky Book Anchoring Meter · Balanced Pricing6-Game Window

Stephon Castle Assists Sticky Book Anchoring Meter (Book Step-Lag vs. Actual Box-Score Surplus)

Book step adjustment (-1.0) tracks actual window production (-1.2).

Unpriced Book Step-Lag-0.2Max Single-Game Book Step: -1.0

Window Open Line: 6.5
Current Posted Line: 5.5
Book Cumulative Step: -1.0
Actual Window Avg: 5.3
Actual Output Delta: -1.2
Modeled Fair Value: 5.3 (-114)

Posted Book Step Line vs. Box-Score Output

Book Line Actual Stat

Game (CT)	Posted Line	Book Step	Actual	Box Surplus
Oct 24 · @ DAL	6.5	—	8	+1.5
Oct 27 · vs SAC	6.5	0.0	5	-1.5
Oct 28 · @ UTA	6.5	0.0	8	+1.5
Oct 31 · vs MIN	5.5	-1.0	4	-1.5
Nov 2 · vs UTA	5.5	0.0	4	-1.5
Nov 4 · vs DAL	5.5	0.0	3	-2.5

WagerBird Write-Up · Stephon Castle Assists (Under 5.5)

Full Dossier Unlocked

Write-Up Thesis

Shared initiation and Castle's current assist production favor a finish short of six assists.

01 · Fundamental Driver

Recent production is restrained

5.0 APG · 4 AST IN EACH OF LAST 2 — Castle averages five assists this season and finished with four in each of his last two games. His current production allows for useful offensive involvement without requiring him to supply the final pass on most scoring possessions.

02 · Fundamental Driver

Other initiators share the floor

FOX, HARPER, CASTLE · STARTING GROUP — Fox and Harper started alongside Castle in the latest game. Their presence gives San Antonio other ways to organize an attack, allowing Castle to spend possessions receiving and finishing rather than always creating the last pass.

Red Team · Counter-Case & Risk Factors

Thesis Invalidation Risks

Castle can regain the lead organizing role while Fox and Harper work as finishers. Extended starter minutes and strong teammate shooting can turn a normal passing workload into enough assists to beat this play.

Settlement Rule: CASHES STEPHON CASTLE FULL GAME ASSISTS UNDER 5.5 WITH 5 OR FEWER ASSISTS; NO PUSH.

WagerBird Nucleus Drift · Team Prop Signal

DAL @ SAS · San Antonio Spurs Points Nucleus Drift (Nov 4, 8:30 PM CT)

Tracks game-by-game pre-game sportsbook posted points lines across San Antonio Spurs's 5 primary contributors.

SAS Nucleus Drift2 of 5 Core Props Adjusted DownMarket Suppressing Team Scoring Ceiling — Implied Team Total Pressure: Bearish

San Antonio Spurs Contributor	Nov 2 vs UTA	Nov 4 vs DAL	Nov 6 @ SAC	Nov 7 @ POR	Game-Over-Game Move	Trend Badge
Victor Wembanyama SAS · Points	26.5	26.5	28.5	27.5	0.0	Flat →
Dylan Harper SAS · Points	16.5	16.5	16.5	16.5	0.0	Flat →
Stephon Castle SAS · Points	16.5	15.5	16.5	16.5	-1.0	Trending Down ↓
De'Aaron Fox SAS · Points	15.5	14.5	15.5	14.5	-1.0	Trending Down ↓
Devin Vassell SAS · Points	11.5	11.5	11.5	11.5	0.0	Flat →

San Antonio Spurs (SAS)2 of 5 Core Props Adjusted Down

Market Suppressing Team Scoring Ceiling — Implied Team Total Pressure: Bearish

Dallas Mavericks (DAL)5 of 5 Core Props Adjusted Down

Market Suppressing Team Scoring Ceiling — Implied Team Total Pressure: Bearish

Connected Matchup Hubs: Explore full game market consensus and team dossiers.

San Antonio Spurs team page →

Verified Player CLV & Write-Up Receipt Vault1 Tracked Write-Up

Stephon Castle Closing-Line Value & Prop Write-Up Receipt Vault (1 Beat, 0 Tied, 0 Lost)

1 Beat / 0 Tied / 0 Lost closing line value record across 1 settled Stephon Castle prop write-up.

Stephon Castle CLV Counts

1 Beat · 0 Tied · 0 Lost

1 Settled CLV Receipt

Date (CT)	Matchup	Market	Release Quote	Closing Line	Actual	CLV Grade	Write-Up
Nov 4	DAL @ SAS	Assists	Under 5.5 (+114) · FanDuel	5.5	3	Beat	Read Write-Up →

Archived Settled Stephon Castle Prop Write-Ups

Nov 4 CT · DAL @ SAS · AssistsFull Write-Up →

Shared initiation and Castle's current assist production favor a finish short of six assists.

Counter-Case: Castle can regain the lead organizing role while Fox and Harper work as finishers. Extended starter minutes and strong teammate shooting can turn a normal passing workload into enough assists to beat this play.

NBA Player Props Closing-Line Value Record (73 Beat, 11 Tied, 36 Lost)

WagerBird grades Closing-Line Value (CLV) by comparing each timestamped release line and price against the release sportsbook's final pre-game closing number (through Nov 6 CT).

Download Raw Signal Audit Log (.CSV)

Prop Lane Window	Beat Close	Tied Close	Lost Close
Season to date (from Sep 23 CT)	73	11	36
Last 30 days (from Oct 8 CT)	73	11	36