QuesTec is a digital media company known mostly for its Umpire Information System (UIS) which is used by Major League Baseball for the purpose of providing feedback and evaluation of Major League umpires. The QuesTec company, based out of Deer Park, New York, has been mostly involved in television replay and graphics throughout its history. In 2001, however, the company signed a 5-year contract with Major League Baseball to use its pitch tracking technology as a means to review the performance of home plate umpires during baseball games. The contract has continued through the 2008 season by annual extensions.
American League
Angel Stadium of Anaheim - Los Angeles Angels of Anaheim
Fenway Park - Boston Red Sox
Jacobs Field - Cleveland Indians
McAfee Coliseum - Oakland Athletics
U.S. Cellular Field - Chicago White Sox
Yankee Stadium - New York Yankees
Tropicana Field - Tampa Bay Rays
National League
Miller Park - Milwaukee Brewers
Chase Field - Arizona Diamondbacks
Minute Maid Park - Houston Astros
Shea Stadium - New York Mets
The UIS system consists of four cameras placed around a ballpark that feed into a computer network and record the locations of pitches throughout the course of a game. Two of the cameras are located high in the stands above the 1st and 3rd base lines to track the trajectory of each pitch. The other two are located at field level and record the stance of the batter so the top and bottom of the strike zone can be set. Computer software then generates CDs that umpires and MLB executives can review and learn from. These CDs include video of the pitches as well as graphic representations of their locations plus feedback on the umpires' accuracy. The UIS was featured in a 2002 segment of Scientific American Frontiers called "Baseball Tech"
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