About This File
MLB 2K10 Official Roster Update 03-23-2010 by 2K Sports.
Extract the Roster1203.ROS to the following directory.
C: / Documents and Settings / [uSER] / Application Data / 2K Sports /Major League Baseball 2K10 / Saves
Windows Vista - 7
C: / Users / [uSER] /AppData / Roaming / 2K Sports / Major League Baseball 2K10 / Saves