No, but the manager usually pulls a starting pitcher when they have thrown about 100 pitches.
5.98 innings, according to baseball-research.com
In MLB, there is no rule about the number of consecutive innings a pitcher can pitch.
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
In MLB, there is no maximum number of innings; the game is played until there is a winner. However, some youth and co-rec leagues may establish a maximum number of innings, this could result in a tie game.
Earned Run Average per 9 innings It shows for every nine innings a pitcher pitches how many runs he has averaged to gived up. This does not include unearned runs (ie runs given up because of errors). Caluclation (Earned Runs/number of innings pitched)*9 innings
ERA is the average number of earned runs a pitcher allows per nine innings pitched.
ERA
Four consecutive innings if she is the starting pitcher. There's no minimum number required for relief pitchers.
There must be a minimum and maximum of 9 players on the field for the defensive team which will include their current Pitcher on the mound however the offensive team can have a minimum of 1 player on the field and a maximum of 4 players on the field.
yes
WHIP is an abbreviation for 'Walks plus Hits per Inning Pitched'. It is a relatively new statistic in baseball that shows, approximately, how many baserunners a pitcher allows per inning. WHIP is calculated by adding the number of base hits a pitcher allows with the number of walks a pitcher allows and then dividing the sum by the number of innings the pitcher has pitched. For example, there is a pitcher who has pitched 200 innings, given up 175 base hits and 84 walks. You would add the number of base hits to the number of walks (175 + 84 = 259) and divide by the number of innings pitched (259/200 = 1.295). The pitcher's WHIP is 1.295. The lower the WHIP, the better the pitcher has pitched. Any pitcher that has a WHIP less than 1.000 has had a great season. The lowest WHIP in MLB history was Pedro Martinez of the Boston Red Sox in the 2000 season. He pitched 217 innings, gave up 128 base hits and 32 walks for a WHIP of 0.737.
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).