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Elliott, Kalb, MLB Network:From MLB Network’s launch on January 1, 2009—when I used baseballreference.com’s play...

Active Leaders & Records for Range Factor/9Inn as P

Photo of <strong>Javier Lopez</strong> Photo of <strong>Henderson Alvarez</strong> Photo of <strong>Luke Gregerson</strong> Photo of <strong>Mike Leake</strong> Photo of <strong>Brad Ziegler</strong> Photo of <strong>Horacio Ramirez</strong> Photo of <strong>Luis Ayala</strong> Photo of <strong>Dallas Keuchel</strong> Photo of <strong>Joe Beimel</strong> Photo of <strong>Joe Smith</strong> Photo of <strong>Jake Arrieta</strong> Photo of <strong>Sonny Gray</strong> Photo of <strong>Clayton Richard</strong> Photo of <strong>Kyle Gibson</strong> Photo of <strong>Tyson Ross</strong> Photo of <strong>Chien-Ming Wang</strong> Photo of <strong>Justin Masterson</strong> Photo of <strong>Trevor Cahill</strong> Photo of <strong>Jhoulys Chacin</strong> Photo of <strong>Tyler Chatwood</strong>

+ - Indicates Hall of Famer. Bold indicates active player.

Statistic Description: Range Factor per 9 Inn 9 * (Putouts + Assists) / Innings Played

Minimum of 1000 IP, 3000 PA, 500 games (fielding, 500 IP for Ps), 200 stolen base attempts (catchers) or 80 stolen base attempts (baserunners only since 1951) or 100 decisions for career and active leaderboards for rate statistics.

This statistic is computed from play-by-play data which is only complete from 1974 to the present. From 1930-1973, the data is incomplete, though for most seasons only less than 20 games per season total are missing. Please see our page on data coverage for a full view of the data used to create these lists.