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Win Shares estimate the number of wins a player contributes to their team, split into Offensive (OWS) and Defensive (DWS) components.
Win Shares is a player statistic which attempts to divvy up credit for team success to the individuals on the team. Players on winning teams naturally accumulate more WS. The metric splits into OWS (offensive contribution) and DWS (defensive contribution).
Players like Shai Gilgeous-Alexander on top-seeded teams accumulate more WS because the team context amplifies individual contributions. A player's WS is inherently tied to team success.
Win Shares estimate the number of wins a player contributes to their team. One win share equals one win. A player who earns 10 WS in a season contributed roughly 10 wins above what a replacement-level player would provide.
A WS above 5.0 is solid. Above 8.0 is All-Star level. Above 12.0 is MVP caliber. Kareem Abdul-Jabbar holds the career WS record at 273.4.
WS is a team-adjusted metric. The total WS available is proportional to team wins, so players on 60-win teams have a larger WS pool to draw from than players on 30-win teams.
Win Shares per 48 minutes (WS/48) normalizes WS by playing time. League average is about .100. Elite players reach .200+ WS/48, meaning they contribute roughly 0.2 wins per 48 minutes played.