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Four consecutive innings if she is the starting pitcher. There's no minimum number required for relief pitchers.
You multiply the number of runs the pitcher has given up by the number of innings in the game then divide it by the number of innings the pitcher has pitched
Unlike the starting pitcher, a relief pitcher has no minimum number of innings pitched. Given the definition of a win, however, it's impossible for a pitcher to achieve it without pitching at least 0.1 inning (one out).
IP stands for Innings Pitched. It is a pitching statistics that records the amount of innings the pitcher pitched. It can be divided into thirds by the outs that were recorded while the pitcher was still on the mound. For example: Its the 5th inning and there are 2 outs. The pitcher needs to be taken out of the game and is replaced with another pitcher. The number of innings pitched for this game would be 4 2/3. The relief pitcher would then pitch 2 1/3. This would add up to the complete 7 inning game.
ERA
ERA is based on 9 innings pitched. When you see a pitcher with a 4.94 ERA that means for every 9 innings pitched, he gives up 4.94 earned runs. Example: A pitcher has pitched 150 innings and given up 60 earned runs. 1) Divide the number of earned runs (60) by the number of innings pitched (150) =0.40. 2) Then take that number (0.4) and multiply it by 9 =3.60. A pitcher who has pitched 150 innings and given up 60 earned runs has an ERA of 3.60.
Earned run average, or ERA
WHIP stands for Walks plus Hits per Inning Pitched and is a relatively new statistic for pitchers. Add the number of walks a pitcher allows to the number of hits a pitcher allows and divide by the number of innings pitched. This gives you the pitcher's WHIP. Like ERA, the lower the WHIP the better. Example: A pitcher has pitched 100 innings, given up 30 walks and 90 hits. Add the number of walks allowed to the number of hits allowed (30 + 90 = 120) and divide by the number of innings pitched (120 / 100 = 1.2). The pitcher's WHIP is 1.2.
Are there any limits on how many innings a pitcher can pitch, in one game? Not in any official rules. In a MLB game on 1920 May 5, both pitchers threw for 26 innings. The game was called due to darkness with the score still 1 to 1.
There is no limitation to the number of innings a baseball game can be played. In theory, the game could go on forever as long as the teams are tied at the end of an inning. The longest professional game I have heard of is a 33 inning game between Pawtucket and Rochester of the International League (minor leagues) in 1981. The longest MLB game was 26 innings between Brooklyn and Boston in 1920.
Pitch more shutout innings - that is, innings where you don't give up an earned run. ERA is calculated by taking the number of earned runs a pitcher gives up, dividing it by the number of innings he/she pitched, then multiplying the result by nine. So, for example, if a pitcher has six complete innings and gives up two earned runs, their ERA becomes three (2 divided by 6 is 1/3, 1/3 multiplied by nine is 3). This works over the course of a pitcher's career, so if a pitcher gives up six earned runs over six innings in one game, his/her ERA becomes nine. If he/she then pitches a complete game shutout (nine full innings, no earned runs) their ERA drops to 3.6 (as it is now six earned runs from fifteen innings).
There is no way to tell the exact average, but there is usually 1 starter for each team, a relief pitcher, and the closer. So about 6 total. -----The number of pitches would depend on many factors, but usually there is a minimum of at least 200 pitches in a game. High scoring games or those with a lot of walks could approach or even pass 300 pitches.