Stat of the Week: Log-5
“Log-5” is a method introduced by Bill James to predict the probability of victory when two teams of a given winning percentage play against each other. The formula is:
Stat of the Week: Leverage
Leverage measures how important a given situation is during a game (relative to the start of the game). The start of a game is defined as a Leverage of 1.0, a neutral situation. As
Stat of the Week: APR
APR, or Adjusted Pitching Runs, measures the number of runs a pitcher prevented as compared to a league-average pitcher in a neutral park in the same number of innings. Derived fro
Stat of the Week: RA
RA, or Run Average, is the number of runs (earned and unearned) allowed by a pitcher or team per 9 innings. Considering all runs allowed by a pitcher is more desirable from a predi
Stat of the Week: Pythagorean Record
Credited to the Greek mathematician Pythagoras for describing the sides of a right triangle. Around the year 1980, Bill James, American baseball writer and statistician, discovered
Stat of the Week: Playoff Success Points (PSP)
PSP is a measure designed by Nate Silver to indicate a team’s success in the postseason in divisional play. PSP assigns points to playoff teams as follows: 3 points for makin
Two Aces in a One-of-a-Kind Moment
The year is 1971 and there’s a collection of undeniable facts. It’s the farewell season for the Washingt
Stat of the Week: MLV
MLV, or Marginal Lineup Value, is a statistic that measures a player’s offensive production in runs above an average offensive player. MLV takes a theoretical team of nine av
Stat of the Week: OPS
The sum of a player’s on-base percentage (OBP) and their slugging average (SLG). This is a quick and easy statistic for understanding a player’s offensive productivity.
Stat of the Week: Stress
“Stress” is a way of characterizing how much of a pitcher’s workload has been compressed into high pitch count outings. The higher the stress ratings over the cou