June 11, 2010 backyard

A banded Rock Pigeon has been visiting our yard recently. The band is light blue "147 AU 2010 FRBB". It probably is a racing pigeon because very few people band Rock Pigeons like they do to chickadees. The bird is very tame and I can come within five feet of it which points towards my racing pigeon theory. Does anyone know where it could have come from?