Weighted Grounded Into Double Play Runs (wGIDP) estimates how many runs a hitter loses or saves by grounding into or avoiding double plays, relative to league average.
By accounting for opportunity, ballpark, and run expectancy, wGIDP offers a clearer view of a player’s situational value than raw GIDP totals.
Use the quick calculator below to convert grounded into double play events and context into a single, comparable run value.
This statistic complements other metrics, such as weighted runs created explained, to provide a holistic evaluation of a player’s offensive contributions.
By incorporating these advanced metrics, analysts can better understand how a hitter performs in critical situations and the impact of their decisions at the plate.
Ultimately, wGIDP helps to differentiate between players who excel in high-pressure moments and those who may struggle when the stakes are highest.
This metric is particularly useful for assessing players in high-pressure situations where the likelihood of grounding into a double play increases.
In conjunction with other advanced stats like weighted runs created plus explained, wGIDP provides a comprehensive perspective on a player’s offensive impact.
Understanding these metrics helps teams make informed decisions regarding player valuations and potential lineups.
“wGIDP Calculator
FAQ
What is wGIDP?
wGIDP stands for Weighted Grounded Into Double Play Runs.
It converts the difference between a player’s actual and expected double plays into a run value, making it easier to compare across seasons and players.
Why use opportunities instead of plate appearances?
Not every plate appearance can result in a double play.
Using only true double play opportunities removes noise and isolates the situations where grounding into two outs is possible.
What default run value should I use?
Run expectancy studies place the cost of a double play at roughly minus 0.37 runs.
You may adjust this number to reflect a specific run expectancy model or ballpark environment.
How can a player have a positive wGIDP?
If a hitter grounds into fewer double plays than expected, the equation returns a positive number, indicating runs saved for his team.
Does wGIDP predict future performance?
It primarily describes past outcomes.
While players with high ground ball rates tend to repeat double play tendencies, year-to-year correlations are modest, so wGIDP is best used descriptively.
“