Keith Woolner is an author for Baseball Prospectus and is the creator of the runs-based statistic VORP or Value Over Replacement Player. VORP is acknowledged by the sabermetrics community as one of the key concepts in the analysis of a player's performance and market valuation.
Education and early career
Woolner earned two bachelor's degrees from the Massachusetts Institute of Technology: one in Mathematics with Computer Science, and one in Management from the MIT Sloan School of Management. He also earned a masters degree in Decision Analysis from Stanford University.
After graduating from MIT, Woolner worked in software development and system management (for Oracle) and several start-ups in Silicon Valley; and later in product management (for SAS). During this time he maintained his avocational interest in baseball statistics and analysis. As he has written,
But no matter how interesting the technology or how novel the application, it was hard to get truly passionate about helping another business improve their profitability or run more efficiently. The work was intellectually stimulating but not emotionally engaging.
What did engage me was baseball statistics. I spent a lot of my free time reading online forums devoted to baseball, and I discovered that baseball statistics had moved far beyond the stats on the backs of the baseball cards I grew up with. I started designing my own customized statistics in the mid-1990s and eventually posted them on Usenet newsgroups and my own Web page.
Sabermetrician and Cleveland Indians front office
In 1998 while still employed full-time in software development and management, he became a regular contributor to the then fledgling Baseball Prospectus, for whom he wrote both for the annual book and the website. He also authored six chapters of Baseball Prospectus's book Baseball Between the Numbers, Jonah Keri, Ed. (New York: Basic Books, 2006) (ISBN 0-465-00596-9).
In May 2007, Woolner announced his departure from Baseball Prospectus to join the front office of the Cleveland Indians as their Manager of Baseball Research & Analytics. In this role, he is "responsible for advanced objective analysis, forecasting, and strategy analysis. [He is also] working on integrating the information from the disparate worlds of scouting and stats in a way that makes each stronger."
- http://www.stathead.com/bbeng/woolner/vorpdescnew.htm and http://www.stathead.com/articles/woolner/vorp.htm.
- Keith Woolner, "In Person: A Career Home Run," Science Careers: From the Journal Science, January 11, 2008.
- Keith Woolner, "Aim for the Head: Aim for the Front Office,"  BaseballProspectus (May 4, 2007)].