Wes - was just a typo on fields/Fields. Changed the field delimiters - thanks! Still getting problem with arcpy.mapping.ExportReport line. Here's error:
Runtime error
Traceback (most recent call last):
File "<string>", line 9, in <module>
File "c:\program files (x86)\arcgis\desktop10.2\arcpy\arcpy\utils.py", line 181, in fn_
return fn(*args, **kw)
File "c:\program files (x86)\arcgis\desktop10.2\arcpy\arcpy\mapping.py", line 515, in ExportReport
return report_source._arc_object.ExportReport(*gp_fixargs((report_layout_file, output_file, dataset_option, report_title, starting_page_number, page_range, report_definition_query, extent, field_map), True))
RuntimeError: Error in generating report