Topic: Recording innings pitched


gene2    -- 04-04-2006 @ 3:50 PM
  How do you record innings pitched if a pitcher enters the game, faces four hitters and does not retire anybody?


ump14    -- 04-04-2006 @ 4:53 PM
  once he takes the mound and faces one batter that is one inning.


bakmr    -- 04-04-2006 @ 5:15 PM
  Well, sort of. In Little League and other youth leagues, any part of an inning counts as a full inning pitched. For purposes of an official box score, I think they just use a plus sign. For example, starting pitcher finishes six innings but is pulled after walking the first batter in the seventh, that's recorded as 6+ innings.


Memphis    -- 04-04-2006 @ 11:15 PM
  Statistically speaking, an "inning pitched" can only be considered the attainment of an OUT. So, innings pitched can only be accrued in increments of thirds.

It is a common convention to indicate innings pitched as "decimals." For instance, 12.2 is considered 12 and two-third innings, not 12 and 2-tenths of an inning. (For computational purposes, this would be 12.667)

If a pitcher enters the game and walks two and gives up a hit, he is considered to have pitched ZERO innings. Each out is one-third of an inning pitched. Even a successful pickoff would count ... without throwing a single pitch to the batter. That would constitute one-third of an inning "pitched."

Since many pitching statistics involve IP (innings pitched) in the denominator, and since division by zero is mathematically undefined, many of the pitcher's statistics cannot be calculated until he obtains at least one out.

So, this pitcher who enters in the first game of the season, walks two and gives up a hit, 1 of whom scores ... his ERA cannot really be computed since ERA is computed by multiplying the number of earned runs allowed by 9 (or 7) divided by the total number of innings pitched. Or, I guess you could say that his ERA is "infinity."

For instance, in the Cub season opener, pitcher Scott Williamson entered the game, walked 2 and gave up a hit, and was then removed. One of those runs scored for an earned run.

If you CLICK THIS LINK before Williamson pitches again, you can see how it looks statistically. His IP is zero and his ERA is "---". It doesn't exist! Yet.

For the purposes of determining pitching limitations for certain youth leagues ... the definition of an inning pitched varies, depending on how that particular league wants to define it. Frequently, any appearance in an inning is considered an inning pitched. However, I have also seen it done in thirds.

David Emerling
Memphis, TN

This message was edited by Memphis on 4-5-06 @ 11:38 AM


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