Here is a map with Crew players teased out (+ selected team staff). You should be able to click on each marker to get general information and a quick quip along with all the other Google map bells and whistles.
(There is a link under both maps that take it full screen.)
View Columbus Crew and Team Staff 2013 in a full screen map
The next map shows where each MLS player is from according to their birth city as recorded by Stats, Inc as of the March 2013 roster deadline. There are 535 players listed and below is the best Google, BatchGeo and myself can figure within a reasonable amount of time (with publicly available info). It's to be used as a general indicator.
View March 2013 MLS Players, Birth City in a full screen map
Thanks for reading.