mlb_rosetta - A universal baseball player crosswalk
This project has been discontinued, see the Chadwick Register for a regularly maintained crosswalk: http://chadwick-bureau.com/the-register/
id - Major League Baseball Advanced Media (MLBAM) ID number. This is the ID number you see at the end of a URL when you look at a player's profile page at mlb.com or a team site. [Integer]
first - first name [String]
last - last name [String]
bis_id - Baseball Information Solutions (BIS) ID. This is the ID number used by Fangraphs and Bill James for their data (www.baseballinfosolutions.com). [Integer]
bis_milb_id - BIS ID numbers (I think?) for players who haven't played in the majors yet. [String]
retrosheet_id - ID numbers for Retrosheet (wwww.retrosheet.org). [String]
baseball_prospectus_id - ID system for Baseball Prospectus' player cards and PECOTA. (www.baseballprospectus.com) [String]
stats_inc_id - ID numbers from STATS, Inc. (www.stats.com) [Integer]
baseball_db_id - Baseball DataBank (www.baseball-databank.org) [Integer]
baseball_reference_id - Baseball Reference (www.baseball-reference.com) [String]
westbay_id - Westbay ID numbers for Japanese players. [Integer]
japan_npb_id - Nippon Pro Baseball ID numbers. (www.npb.or.jp/eng/) [Integer]
korea_kbo_id - Korea Baseball Organization ID numbers. (www.koreabaseball.com) [Integer]
lahman_id - Widely used Lahman ID system. [String]
Regarding Retrosheet IDs:
The information used here was obtained free of
charge from and is copyrighted by Retrosheet. Interested
parties may contact Retrosheet at "www.retrosheet.org".
mlb_rosetta is meant for personal research purposes. Each of these websites and data providers have their own terms of service for use of player data.