Walks plus hits per inning pitched
baseball statistics, Walks plus hits per inning pitched (WHIP) is a sabermetric measurement of the number of baserunners a pitcherhas allowed per inning pitched. It is a general measure of a pitcher's ability to prevent batters from reaching base.
sabermetric|formula= Where the
earned run average(ERA) measures runs allowed, WHIP measures a pitcher's actual effectiveness against batters faced. It is calculated by adding the number of walks and hits allowed divided by the number of innings pitched. If an error is committed with one out remaining in an inning, the pitcher's ERA stops at that point, and further runs aren't reflected by it. The WHIP will continue to accumulate as batters reach base. A WHIP of 1.0 or below will often rank among the best in Major League Baseball.
on-base plus slugging(OPS) for hitters, WHIP is one of the few sabermetric statistics to enter mainstream baseball usage. It is one of the most commonly used statistics in fantasy baseball, and is standard in fantasy leagues that use the 4×4, 5×5, and 6×6 formats.
The lowest WHIP in baseball history was posted by
Boston Red Soxpitcher Pedro Martínezin 2000. Martinez allowed 128 hits and 32 walks in 217 innings, for an 0.7373 ratio. Cleveland Indiansright-hander Addie Jossholds the career record, with a 0.9678 WHIP in 2327 innings. However, Joss' career was cut short by meningitisat the age of 31, and thus he had no "decline phase." Chicago White Sox spitballer Ed Walshis the only other pitcher with a career WHIP under 1.00, with a 0.9996 WHIP in 2964 innings. Pedro Martínez is third all-time with a career WHIP of 1.0306 as of early 2008, not counting Mariano Rivera's 1.03 in only 1003 innings, which is the best ever by a predominant relief pitcher. Among pitchers in the top 100 for innings pitched, the New York Giants' Christy Mathewson(1.0588 WHIP in over 4780 innings), and the Washington Senatorsworkhorse Walter Johnson(1.0611 WHIP in more than 5914 innings) are well ahead of the pack.
* [http://www.baseball-reference.com/leaders/WHIP_season.shtml Baseball's single-season WHIP leaders]
* [http://www.baseball-reference.com/leaders/WHIP_career.shtml Baseball's all-time WHIP leaders]
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