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Glossary

2P
2-Point Field Goals
2P%
2-Point Field Goal Percentage; the formula is 2P / 2PA.
2PA
2-Point Field Goal Attempts
3P
3-Point Field Goals (available since the 1979-80 season in the NBA)
3P%
3-Point Field Goal Percentage (available since the 1979-80 season in the NBA); the formula is 3P / 3PA.
3PA
3-Point Field Goal Attempts (available since the 1979-80 season in the NBA)
Age
Age; player age on February 1 of the given season.
AST
Assists
AST%
Assist Percentage (available since the 1964-65 season in the NBA); the formula is 100 * AST / (((MP / (Tm MP / 5)) * Tm FG) - FG). Assist percentage is an estimate of the percentage of teammate field goals a player assisted while he was on the floor.
Award Share
The formula is (award points) / (maximum number of award points). For example, in the 2002-03 MVP voting Tim Duncan had 962 points out of a possible 1190. His MVP award share is 962 / 1190 = 0.81.
BLK
Blocks (available since the 1973-74 season in the NBA)
BLK%
Block Percentage (available since the 1973-74 season in the NBA); the formula is 100 * (BLK * (Tm MP / 5)) / (MP * (Opp FGA - Opp 3PA)). Block percentage is an estimate of the percentage of opponent two-point field goal attempts blocked by the player while he was on the floor.
DPOY
Defensive Player of the Year
DRB
Defensive Rebounds (available since the 1973-74 season in the NBA)
DRB%
Defensive Rebound Percentage (available since the 1970-71 season in the NBA); the formula is 100 * (DRB * (Tm MP / 5)) / (MP * (Tm DRB + Opp ORB)). Defensive rebound percentage is an estimate of the percentage of available defensive rebounds a player grabbed while he was on the floor.
DRtg
Defensive Rating (available since the 1973-74 season in the NBA); for players and teams it is points allowed per 100 posessions. This rating was developed by Dean Oliver, author of Basketball on Paper. Please see the article Calculating Individual Offensive and Defensive Ratings for more information.
DWS
Defensive Win Shares; please see the article Calculating Win Shares for more information.
eFG%
Effective Field Goal Percentage; the formula is (FG + 0.5 * 3P) / FGA. This statistic adjusts for the fact that a 3-point field goal is worth one more point than a 2-point field goal. For example, suppose Player A goes 4 for 10 with 2 threes, while Player B goes 5 for 10 with 0 threes. Each player would have 10 points from field goals, and thus would have the same effective field goal percentage (50%).
FG
Field Goals (includes both 2-point field goals and 3-point field goals)
FG%
Field Goal Percentage; the formula is FG / FGA.
FGA
Field Goal Attempts (includes both 2-point field goal attempts and 3-point field goal attempts)
FT
Free Throws
FT%
Free Throw Percentage; the formula is FT / FTA.
FTA
Free Throw Attempts
Four Factors
Dean Oliver's "Four Factors of Basketball Success"; please see the article Four Factors for more information.
G
Games
GB
Games Behind; the formula is ((first W - W) + (L - first L)) / 2, where first W and first L stand for wins and losses by the first place team, respectively.
GmSc
Game Score; the formula is PTS + 0.4 * FG - 0.7 * FGA - 0.4*(FTA - FT) + 0.7 * ORB + 0.3 * DRB + STL + 0.7 * AST + 0.7 * BLK - 0.4 * PF - TOV. Game Score was created by John Hollinger to give a rough measure of a player's productivity for a single game. The scale is similar to that of points scored, (40 is an outstanding performance, 10 is an average performance, etc.).
GS
Games Started (available since the 1982 season)
L
Losses
L Pyth
Pythagorean Losses; the formula is G - W Pyth.
Lg
League
MVP
Most Valuable Player
MP
Minutes Played (available since the 1951-52 season)
MOV
Margin of Victory; the formula is PTS - Opp PTS.
ORtg
Offensive Rating (available since the 1977-78 season in the NBA); for players it is points produced per 100 posessions, while for teams it is points scored per 100 possessions. This rating was developed by Dean Oliver, author of Basketball on Paper. Please see the article Calculating Individual Offensive and Defensive Ratings for more information.
Opp
Opponent
ORB
Offensive Rebounds (available since the 1973-74 season in the NBA)
ORB%
Offensive Rebound Percentage (available since the 1970-71 season in the NBA); the formula is 100 * (ORB * (Tm MP / 5)) / (MP * (Tm ORB + Opp DRB)). Offensive rebound percentage is an estimate of the percentage of available offensive rebounds a player grabbed while he was on the floor.
OWS
Offensive Win Shares; please see the article Calculating Win Shares for more information.
Pace
Pace Factor (available since the 1973-74 season in the NBA); the formula is 48 * ((Tm Poss + Opp Poss) / (2 * (Tm MP / 5))). Pace factor is an estimate of the number of possessions per 48 minutes by a team. (Note: 40 minutes is used in the calculation for the WNBA.)
PER
Player Efficiency Rating (available since the 1951-52 season); PER is a rating developed by ESPN.com columnist John Hollinger. In John's words, "The PER sums up all a player's positive accomplishments, subtracts the negative accomplishments, and returns a per-minute rating of a player's performance." Please see the article Calculating PER for more information. Also see VAA and VAR.
Per 36 Minutes
A statistic (e.g., assists) divided by minutes played, multiplied by 36.
Per Game
A statistic (e.g., assists) divided by games.
PF
Personal Fouls
Poss
Possessions (available since the 1973-74 season in the NBA); the formula for teams is 0.5 * ((Tm FGA + 0.4 * Tm FTA - 1.07 * (Tm ORB / (Tm ORB + Opp DRB)) * (Tm FGA - Tm FG) + Tm TOV) + (Opp FGA + 0.4 * Opp FTA - 1.07 * (Opp ORB / (Opp ORB + Tm DRB)) * (Opp FGA - Opp FG) + Opp TOV)). This formula estimates possessions based on both the team's statistics and their opponent's statistics, then averages them to provide a more stable estimate. Please see the article Calculating Individual Offensive and Defensive Ratings for more information.
PProd
Points Produced; Dean Oliver's measure of offensive points produced. Please see the article Calculating Individual Offensive and Defensive Ratings for more information.
PTS
Points
ROY
Rookie of the Year
SMOY
Sixth Man of the Year
SOS
Strength of Schedule; a rating of strength of schedule. The rating is denominated in points above/below average, where zero is average. My colleague Doug Drinen of Pro-Football-Reference.com has written a great explanation of this method.
SRS
Simple Rating System; a rating that takes into account average point differential and strength of schedule. The rating is denominated in points above/below average, where zero is average. My colleague Doug Drinen of Pro-Football-Reference.com has written a great explanation of this method.
STL
Steals (available since the 1973-74 season in the NBA)
STL%
Steal Percentage (available since the 1973-74 season in the NBA); the formula is 100 * (STL * (Tm MP / 5)) / (MP * Opp Poss). Steal Percentage is an estimate of the percentage of opponent possessions that end with a steal by the player while he was on the floor.
Stops
Stops; Dean Oliver's measure of individual defensive stops. Please see the article Calculating Individual Offensive and Defensive Ratings for more information.
Tm
Team
TOV
Turnovers (available since the 1977-78 season in the NBA)
TOV%
Turnover Percentage (available since the 1977-78 season in the NBA); the formula is 100 * TOV / (FGA + 0.44 * FTA + TOV). Turnover percentage is an estimate of turnovers per 100 plays.
TRB
Total Rebounds (available since the 1950-51 season)
TRB%
Total Rebound Percentage (available since the 1970-71 season in the NBA); the formula is 100 * (TRB * (Tm MP / 5)) / (MP * (Tm TRB + Opp TRB)). Total rebound percentage is an estimate of the percentage of available rebounds a player grabbed while he was on the floor.
TS%
True Shooting Percentage; the formula is PTS / (2 * TSA). True shooting percentage is a measure of shooting efficiency that takes into account field goals, 3-point field goals, and free throws.
TSA
True Shooting Attempts; the formula is FGA + 0.44 * FTA.
Usg%
Usage Percentage (available since the 1977-78 season in the NBA); the formula is 100 * ((FGA + 0.44 * FTA + TOV) * (Tm MP / 5)) / (MP * (Tm FGA + 0.44 * Tm FTA + Tm TOV)). Usage percentage is an estimate of the percentage of team plays used by a player while he was on the floor.
W
Wins
W > .500
Wins Over .500; the formula is (W - L) / 2.
W Pyth
Pythagorean Wins; the formula is G * (Tm PTS14 / (Tm PTS14 + Opp PTS14)). The formula was obtained by fitting a logistic regression model with log(Tm PTS / Opp PTS) as the explanatory variable. Using this formula for all BAA, NBA, and ABA seasons, the root mean-square error (rmse) is 3.14 wins. Using an exponent of 16.5 (a common choice), the rmse is 3.48 wins. (Note: An exponent of 10 is used for the WNBA.)
W-L%
Won-Lost Percentage; the formula is W / (W + L).
WS
Win Shares; an estimate of the number of wins contributed by a player. Please see the article Calculating Win Shares for more information.
WS/48
Win Shares Per 48 Minutes (available since the 1951-52 season in the NBA); an estimate of the number of wins contributed by the player per 48 minutes (league average is approximately 0.100). Please see the article Calculating Win Shares for more information.
Win Probability
The estimated probability that Team A will defeat Team B in a given matchup.
Year
Year that the season occurred. Since the NBA season is split over two calendar years, the year given is the last year for that season. For example, the year for the 1999-00 season would be