Sports Stats Websites

NFL

Pro-Football-Reference.com - NFL historical stats / Every season, team, player, coach, draft, box scores, play‑by‑play since 1978
NFL.com - Official league site / Scores, stats, standings, news
ESPN NFL Stats - League‑wide player/team stats
NFL Next Gen Stats - Official advanced stats / Completion probability, expected rushing yards, win probability
Pro Football Focus (PFF) - Player grades / 0‑100 grades, advanced statistics
RBSDM.com - EPA/play, CPOE, four‑quadrant graphs, Luck tab; run by Ben Baldwin
NFL Savant - Play‑by‑play data / Every snap with advanced metrics
nfelo - NFL ELO rankings
FTNFantasy - Fantasy based NFL stats, some stats paywalled
NFL Playoff Scenarios - Weekly playoff clinching/elimination scenarios
ESPN Playoff Machine - Simulate playoff scenarios / Custom outcomes

Basketball-Reference.com - NBA/ABA/WNBA stats / Player pages, game logs, advanced stats, European competition
NBA.com - Official league site / Scores, news, schedules, standings, video
ESPN NBA Stats - League‑wide player/team leaderboards, sortable tables
Databallr - Advanced analytics / Plus‑Minus, defensive metrics, player comparisons
Viziball - Charts, Player Impact Estimate (PIE), Net rating, Usage, True Shooting
Dunks & Threes - Advanced stats / Estimated Plus-Minus, ratings, strength of schedule. Some stats paywalled, but many available for free
NBA RAPM - NBA player impact stats / Ratings, On/Off, RAPM, and many other unique advanced stats

WNBA.com - Official stats portal / Advanced box scores, shooting breakdowns, shot charts, Four Factors, PIE
WNBA at Basketball-Reference.com - WNBA stats / Player pages, game logs, advanced stats
ESPN NBA Stats - League‑wide player/team leaderboards, sortable tables
Her Hoop Stats - Analytics / Founded by former 76ers analytics director, WNBA & NCAA data

Hockey-Reference.com - NHL stats / Player pages, advanced stats, shot location charts, game logs since 2008
NHL.com - Official league site / Scores, stats, standings, news
NHL EDGE - Official advanced stats / Player & puck tracking, zone maps
ESPN NHL Stats - League‑wide player/team stats
Natural Stat Trick - Shot attempts, scoring chances, zone entries, situational splits
MoneyPuck - Expected goals (xG), shot quality, goalie stats
Evolving Hockey - Player/team comparisons, trends, charts, line combinations
Elite Prospects - Up‑to‑date stats, European players, junior leagues

Baseball-Reference.com - MLB historical stats / Player pages, game logs, advanced stats, minor/negro/international leagues
MLB.com - Official league site / Scores, stats, standings, news
Baseball Savant - Statcast database / Per‑pitch, per‑game, per‑player, per‑team advanced metrics
ESPN MLB Stats - League‑wide player/team stats
TJStats - MLB & MiLB / Statcast metrics, tjStuff+ grades

FBref.com - 48 countries, 152 competitions, 200,000+ players, xG, women's football
ESPN Soccer Stats - Soccer stats covering the world cup and all leagues
MLSSoccer.com - Official league site / Scores, stats, standings, news
Tribuna.com - Ratings, tactical insights, match breakdowns, fan discussions
Flashscore - Live scores, real‑time updates, extensive league coverage
Understat - Expected goals (xG) and shot‑based analytics
WhoScored - Player ratings, match statistics, live scores
American Soccer Analysis - MLS advanced stats / xG Difference, Goals Added, team & player performance

PGA Tour Stats - Official stats / Strokes Gained, ShotLink, radar metrics (ball speed, clubhead speed, apex height)
ESPN Golf Stats - Leaderboards, hole‑by‑hole scores, tournament data
Data Golf - Statistical analysis / Data visualization for pro & amateur golf

College Football at Sports-Reference - Teams, players, schedules, gamelogs, advanced stats
College Men's Basketball at Sports-Reference - Teams, players, scores, leaders
College Women's Basketball at Sports-Reference - Advanced stats (PER, Win Shares), gamelogs, split stats back to 1981-1982
ESPN College Football Stats - College football stats
ESPN Men's College Basketball Stats - College basketball stats
ESPN Women's College Basketball Stats - College basketball stats

Stathead.com - Premium research tools / Custom searches across all Sports‑Reference databases (plenty of free functionality)
StatMuse - Stats search tool covering NFL, NBA, WNBA, NHL, MLB, Soccer, College Football
StatRankings - 400+ unique metrics, team efficiency, player usage
Opta Analyst - Advanced stats for NBA, NFL, Soccer, and more

Spotrac - Contracts, salaries, caps, bonuses, transactions / MLB, NBA, NFL, NHL, MLS, WNBA
Over The Cap - NFL salary cap / Bonus money, dead money, positional rankings
PuckPedia - NHL salary cap / Trusted cap, contract, roster‑management info
FanGraphs - MLB contracts, salaries, transactions and more
CapSheets - NBA cap sheets by team / Cap excepxtions, draft pick summaries, other cap insights
SalarySwish - NBA cap data and tools / Team and player data, calculators, draft tools, trade machine