The purpose for keeping track of data on Umpires is to learn of any biases that
may be inherent in the way an individual umpire calls balls and strikes or shows
sentiment for or against the home team. Psychological and other intangible factors
might be used to explain why such behavior occurs. But we believe to just look at
the results and use them in determining whether any biases are evident, subconcious
As handicappers we must be aware of the factors likely to have the greatest influences
on the outcome of a game. Obviously the home umpire is the individual who exerts
the greatest influence in a game since he makes a determination on any pitch that
is not hit as to whether it is a ball or a strike.
At Logical Approach we use Umpire data as a secondary factor in our handicapping.
By that we mean that we do not use the data to put us on to a play. Rather, we use
the data to supplement, reinforce or contradict a play otherwise selected.
As an example, if there is a game we are considering as an OVER play, and the
home plate umpire has shown a very strong tendency to be involved in OVER games,
our OVER play is strengthened. Conversely, if the home plate umpire has shown a strong
tendency to be involved in UNDER games, we might back off our OVER play if it was
only a marginal or luke warm play using other factors. If it were a strong OVER play,
we might still play the game OVER despite the umpire's strong UNDER tendency, but
might cut back on the size of the play.
In general, the Umpiring rotation is as follows: HOME ---> THIRD --->
SECOND --->FIRST ---> HOME
Thus, today's first base Umpire will be behind the plate tomorrow. There are always
exceptions to this rule (such as with short crews, umpire vacations, umpire injuries,
etc.). But the above rotation is reliable 95 + % of the time.
Thus it is easy to anticipate which umpire will be behind the plate in a given
game once the umpiring crew is known. For the second and following games of a series
this information is fairly easy to determine. Just look in the boxscore for the opening
game of the series and the first base umpire in that opening game will be behind
the plate in game two.
But what about the Opening game of a series? Fortunately, most wire services report
the umpiring assignments some ten to twenty minutes prior to the scheduled start
of every game. Access to a sports news source on the Internet (such as ESPN, Fox
Sports, CNN-SI, etc.) will allow you to get this imformation before the start of
the game. In Las Vegas sports books this information comes across the ticker that
appears in virtually every sports book. Thus we can know in advance the home plate
umpire in every game (not just the opening game) by watching the ticker or surfing
Prior to the 2000 season Umpires were supervised by the American League and National
Leagues and, with the exception of Interleague games, worked games only within their
League. Beginning in 2000 all Umpires are under the single jurisdiction of Major
League Baseball and are assigned to games in both leagues.
We have Umpire stats broken down by league for years prior to 2000, covering the 1999 season, the 1998 season and three year data for 1995-97. The 1998 and 1999 Pages have data for both Leagues whereas the 1995-97 data has separate pages for each League and can be accessed by clicking on the desired link below. The Reports show data for each umpire when they are behind home plate. The results include the home/road results as well as the Over/Under/Push results, including the average total runs scored per game. For 1999 we have added the Umpire's Strikeout to Walk Ratio for Starting Pitchers. We hope you enjoy, and profit from, the stats!
Starting in 2000 we have just a single chart that shows the statistics for all Major League Umpires. A few new categories were added for 2000 including the ERA of the starting pitchers in each game for which an Umpire is behind home plate, the ratio of Baserunners Allowed Per Inning for the starting pitchers and the average number of walks issued per 9 Innings per starting pitcher.
Current 2013 Major League Baseball Umpire Statistics
(Current through Wednesday, May 15, 2013)
Current Season Data is Updated after the 15th and final day of the Month
Final 2012 Major League Baseball Umpire Statistics
Final 2011 Major League Baseball Umpire Statistics
Final 2010 Major League Baseball Umpire Statistics
Final 2009 Major League Baseball Umpire Statistics
Final 2008 Major League Baseball Umpire Statistics
Final 2007 Major League Baseball Umpire Statistics
Final 2006 Major League Baseball Umpire Statistics
Final 2005 Major League Baseball Umpire Statistics
Final 2004 Major League Baseball Umpire Statistics
Final 2003 Major League Baseball Umpire Statistics
Final 2002 Major League Baseball Umpire Statistics
Final 2001 Major League Baseball Umpire Statistics
Final 2000 Major League Baseball Umpire Statistics
1995-97 AL Umpires
1995-97 NL Umpires