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To make a graph of the Win Expectancy of a baseball game, use the graph a game tool.

This data is from MLB games from 1957-2020, including postseason games. It omits games that are less than 9 innings (doubleheaders in 2020) as well as extra inning games where a runner starts on second base (non-playoff games in 2020). All data is available at Retrosheet.

Linked from: FiveThirtyEight (search for "eighth inning"), The Washington Post, CBS Sports, CBS Sports again, The Athletic, Royals Review, Beyond the Box Score, and more!

Idea taken from's Win Expectancy Finder (now defunct). Here's a good article about Win Expectancy. Leverage Index calculations based on this article.

Source files available on GitHub.

Articles written with this data:

The information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at 20 Sunset Rd., Newark, DE 19711.

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