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17 Prospectus Feature: The Need for Adjusted Exit Velocity by Jonathan Judge, Nick Wheatley-Schaller and Sean O'Rourke
4 BP Announcements by Nick Wheatley-Schaller
0 The Week in Quotes: April 13-19, 2015 by Chris Mosch and Nick Wheatley-Schaller
1 The Week in Quotes: April 6-12, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: March 23-29, 2015 by Chris Mosch and Nick Wheatley-Schaller
0 Every Team's Moneyball: Cleveland Indians: Yay Handedness! by Nick Wheatley-Schaller
0 The Week in Quotes: March 9-15, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: March 2-9, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: February 23-March 1, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
1 The Week in Quotes: February 17-22, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: February 9-16, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: February 2-8, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: January 27-February 1, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: January 19-26, 2015 by Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: January 12-19, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
2 The Week in Quotes: January 5-11, 2015 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: December 29 - January 4 by Nick Bacarella and Nick Wheatley-Schaller
0 The Week in Quotes: December 22-28, 2014 by Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: December 15-21, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
2 The Week in Quotes: December 8-14, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: December 1-7, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: November 24-30, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: November 17-23, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: November 10-16, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
1 The Week in Quotes: November 3-9, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: October 27th-November 2nd, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: October 20th-26th, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: October 13-19, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: October 6-12th, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: September 30-October 5 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: September 22-29 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
1 The Week in Quotes: September 16-22, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
3 The Week in Quotes: September 8-14 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
2 The Week in Quotes: September 2-8, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: August 25-September 1, 2014 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: August 18-24 by Nick Wheatley-Schaller and Nick Bacarella
0 The Week in Quotes: August 4-10 by Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: July 28-August 3, 2014 by Nick Bacarella, Morris Greenberg, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: July 21-27, 2014 by Nick Bacarella, Morris Greenberg, Chris Mosch and Nick Wheatley-Schaller
3 The Week in Quotes: July 14-20, 2014 by Chris Mosch, Nick Wheatley-Schaller and Nick Bacarella
0 The Week in Quotes: June 30-July 6 by Nick Bacarella, Morris Greenberg, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: June 23-29 by Nick Bacarella, Morris Greenberg and Nick Wheatley-Schaller
1 The Week in Quotes: June 16-22 by Morris Greenberg and Nick Wheatley-Schaller
0 The Week in Quotes: June 9-15 by Nick Bacarella, Morris Greenberg and Nick Wheatley-Schaller
2 The Week in Quotes: June 3-9 by Nick Bacarella, Morris Greenberg and Nick Wheatley-Schaller
0 The Week in Quotes: May 26-June 1 by Nick Bacarella, Morris Greenberg, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: May 19-26 by Nick Bacarella, Morris Greenberg and Nick Wheatley-Schaller
0 The Week in Quotes: May 13-19 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
0 The Week in Quotes: May 5-11 by Nick Bacarella, Morris Greenberg, Chris Mosch and Nick Wheatley-Schaller
1 The Week in Quotes: April 28 - May 4 by Nick Bacarella, Chris Mosch and Nick Wheatley-Schaller
What you need to know before your sweeping take about a player's exit velocity.
Note: Baseball Prospectus has removed the leaderboards mentioned in this article. Thank you for your interest in our work and for your patience as we attempt to resolve this issue.
Last year, the folks at MLB Advanced Media started publishing what is commonly described as “exit velocity”: the pace at which the baseball is traveling off the bat of the hitter, as measured by the new
As a statistic, exit velocity is attractive for several reasons. For one thing, it is new and fresh, and that’s always exciting. It also makes analysts feel like they are traveling inside the hitting process, and getting a more fundamental look at a hitter or pitcher’s ability to control the results of balls in play.
However, we’ve seen many people take the raw average of a player’s exit velocities and assume it to be a meaningful indication, in and of itself, of pitcher or batter productivity. This is not entirely wrong: Raw exit velocity can correlate reasonably well with a batter’s performance.
But this use of raw averages also creates some problems. First, if you use exit velocity as a proxy of player ability, then you must also accept that one player’s exit velocity is a function of his opponents, be they a batter or pitcher. Put more bluntly, a player’s average exit velocity is biased by the schedule of the player’s team.
Second, and much more importantly, we have concluded Statcast exit velocity readings, as currently published, are themselves biased by the ballpark in which the event occurs. This goes beyond mere differences in temperature and park scoring tendencies. In fact, it appears that the same player generating the same hit will have its velocity rated differently from stadium to stadium, even if you control for other confounding factors.
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