Runs produced (RP = R+RBI-HR) are how many runs a player actually made, either by scoring himself or batting in a teammate. HR are subtracted out so as not to count the run scored by the batter twice.
Each player is listed with the team on which he played the most games and the first and last (or most recently completed) seasons of his career. Data is from 1876-2010. 2011 data is not included here, though some players may be active. See second comment for team/franchise abbreviations. A related quiz, Most Career Runs Produced (Above Average), can be found here: http://www.sporcle.com/games/DJC83/runprodaa