Transparency
DATA Sources
Every number on AllFame comes from somewhere verifiable. This page documents every data source, API endpoint, update method, and known limitation behind our HOF Scores.
THE Pipeline
How raw sports data becomes an HOF Score in 5 steps.
Step 1
Ingest
Pull stats from league APIs daily during season
Step 2
Validate
Cross-reference against multiple sources for accuracy
Step 3
Benchmark
Compare against HOF historical data by age and position
Step 4
Score
Calculate 5 dimensions and composite HOF Score
Step 5
Publish
Update leaderboard, profiles, milestones, and history
PRIMARY Sources
Each source is rated by update method (automated or manual), access cost, and verification status.
⚾ MLB Coverage
Complete coverage of all 30 MLB teams via the official Stats API, supplemented by Baseball Reference for WAR and advanced metrics.
929
Players
30
Teams
~100
WAR Verified
Daily
Updates
MLB Stats API
Bios, career stats, season stats, awards, rosters
Update: Daily (automated)
Baseball Reference
bWAR, HOF benchmarks, historical comparisons
Update: Weekly (manual top 100)
🏀 NBA Coverage
Active roster coverage via the NBA Stats API, supplemented by Basketball Reference for Win Shares, BPM, and VORP.
210
Players
30
Teams
~60
WS Verified
Daily
Updates
NBA Stats API
Bios, career stats, season stats, awards, rosters
Update: Daily (automated)
Basketball Reference
Win Shares, BPM, VORP, HOF benchmarks
Update: Weekly (manual top 60)
DATA Reliability
Not all data points have the same confidence level. Here's our honest assessment of each metric's reliability.
| Metric | Source | Reliability | Notes |
|---|---|---|---|
| Batting stats (H, HR, AVG) | MLB Stats API | 99% | Official source, real-time |
| MLB WAR (top 100) | Baseball Reference | 97% | Manually verified, updated weekly |
| MLB WAR (remaining) | Estimated | 70% | Estimated from available stats |
| NBA basic stats (PTS, AST) | NBA Stats API | 98% | Official source, real-time |
| NBA WS/BPM (top 60) | Basketball Reference | 95% | Manually verified, updated weekly |
| NBA WS/BPM (remaining) | Estimated | 65% | Estimated from basic stats |
| Awards / All-Star | League APIs | 99% | Official source, complete |
| HOF Benchmarks | AllFame curated | 96% | 35 HOFers, manually compiled |
| Milestone ETAs | Calculated | 60% | Pace-based projection, not guaranteed |
Transparency note: Estimated WAR/WS values for non-top players carry meaningful uncertainty. If you notice a specific player's stats seem incorrect, report it to data@allfame.co and we'll investigate.