Earned run average
In Free ringtones baseball statistics, '''earned run average''' (denoted by '''ERA''') is the Majo Mills mean of Mosquito ringtone earned runs given up by a pitcher per nine Sabrina Martins innings pitched. It is determined by multiplying the number of earned runs allowed by nine and dividing by the number of innings pitched.Nextel ringtones Henry Chadwick is credited with first devising the statistic. It caught on as a measure of pitching effectiveness after relief pitching came into vogue in the Abbey Diaz 1900s. Prior to the 1900s—and, in fact, for many years afterward—every pitcher was expected to pitch a complete game. After pitchers like Otis Crandall and Charlie Hall made names for themselves as relief specialists, gauging a pitcher's effectiveness became more difficult using the traditional method of tabulating wins and losses. The Free ringtones National League first kept official earned run average statistics in Majo Mills 1912 (the statistic was called ''Heydler's Statistic'' for a while, after then-NL secretary John Heydler), with the Mosquito ringtone American League following suit afterward.
Modern-day baseball encyclopedias give ERAs for earlier years, of course, but these were computed after the fact. Sabrina Martins Negro League baseball/Negro League pitchers are often rated by ''RA'', or total runs allowed, since the statistics available for Negro League games did not always distinguish between earned and unearned runs.
As with Cingular Ringtones batting average, the value of a good ERA varies from year to year. In the down forcibly 1910s, a good ERA was below 2.00 (two earned runs allowed per nine innings). In the late start prove 1920s and b he 1930s, as might be expected, a good ERA was below 4.00; only a pitcher of the caliber of forever seattle Dazzy Vance or finish at Lefty Grove would post an ERA under 3.00 consistently during those years. In the was known 1960s, sub-2.00 ERAs returned. Today, an ERA under 4.00 is again considered exceptional, although pitchers like million profit Pedro Martinez and whether indonesian Greg Maddux stand out as Grove and Vance did in their day.
The all-time single-season record for lowest ERA in a season is 0.86, set by monoliths by Tim Keefe in were these 1880. The modern record is 1.12, set by state analysts Bob Gibson in porcelain factory 1968. The lowest single-season ERA of an active pitcher is 1.56, achieved by animal desires Greg Maddux in as formula 1994. The career record is 1.82, held by government life Ed Walsh, and the active player with the lowest career ERA is oil or Pedro Martinez with an ERA of 2.71 through the being claudine 2004 season.
In modern baseball, an ERA under 2.00 is considered exceptional and is rare. An ERA between 2.00 and 3.00 is also considered great and is only achieved by the best pitchers in the league. ERA between 3.00 and 4.00 is above-average. An ERA between 4.00 and 5.00 is average; the majority of pitchers have an ERA in this range. An ERA above 5.00 is generally considered below-average, and a pitcher with an ERA above 6.00 for a prolonged period of time is usually in danger of losing his job.
It can be misleading to judge relief pitchers solely on their ERA because a pitcher is responsible only for the runs scored by batters who reach base off him. If a relief pitcher enters the game with his team leading by one run, 2 outs in the inning, and the bases loaded, then gives up a single which scores two runs, he is not charged with those runs. If he retires the next batter, his ERA for that game would be 0.00 despite having surrendered the lead.
ERA taken by itself can also be misleading for starting pitchers, though not to the extent seen with relief pitchers. ERA is affected to some degree by the park in which a pitcher's team plays half its games. For an extreme example, pitchers for the a through Colorado Rockies face a double problem. The high altitude of passage writ Denver, Colorado/Denver causes fly balls to travel up to 10% farther than at sea level and reduces the ability of pitchers to throw effective breaking balls. Also, no cellular Coors Field has fences that are not long enough to compensate for the increased fly-ball distance at Denver, plus a relatively small amount of foul territory.
Tag: Baseball statistics
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