About WHIP

Walks and hits per innings pitched (WHIP) is a metric that shows how often, on average, hitters get on base per inning against a pitcher. It is calcuated by summing hits and walks for a give time period then dividing by the number of innings during that time period. Generally, for WHIP, lower is better. (Source)

Aroldis Chapman and Mariano Rivera's WHIP Per Season Comparison Line Chart

This bar chart compares Aroldis Chapman's and Mariano Rivera’s WHIP for each season of their Major League careers. The data is displayed by player season number instead of the season year to allow for better comparisons as the players progressed through their careers.
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Aroldis Chapman and Mariano Rivera's Per Season WHIP Box Plot

This chart attempts to draw a comparison between Aroldis Chapman and Mariano Rivera by summarizing their WHIP for each season they played. The box represents the middle 50% of the data for each player with the line in the box being the median value. The whiskers represent the ranges for the top and bottom 25% of the data. Review the spread and medians to draw your conclusions!
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Aroldis Chapman and Mariano Rivera's WHIP Comparison Data Table

This table shows Aroldis Chapman and Mariano Rivera's WHIP statistics by season for their full MLB careers. Included with the raw season stats are the aggregations’ sum, average, minimum, maximum, and median. The data is displayed by season number instead of by calendar year to allow for better comparisons as the players progressed through their careers. Because not all players have the same career lengths, seasons not completed will display "—"
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