The newest NBA 2K14 roster update from 2K Sports is now available for download on all platforms, featuring rotations that have been updated through March 7th, 2014. It includes injury updates and addition of 6 Latin Nights jerseys, 2 Saint Patrick's Day uniforms & the new alternate jersey of the Nets.
Start > Run > Type : %appdata%, then find 2K Sports\NBA 2K14\Saves , overwrite all the files.
for XP users: C:\Documents and Settings\[your user name]\Application Data\2K Sports\NBA 2K14\Saves
for Vista or Win 7 users: C:\Users\[your user name]\AppData\Roaming\2K Sports\NBA 2K14\Saves
Then go to NBA 2K14 and load it