openlayers 2 - Does the ArcGIS Javascript API support multiple map service urls per layer?

I've called tilecache from OpenLayers in the same manner as the example below. Is it possible to do something similar with the ArcGIS WMS map layer?

var urlArray = ["http://tilecache.osgeo.org/wms-c/Basic.py",
    "http://tilecache.osgeo.org/wms-c/Basic.py"];
layer = new OpenLayers.Layer.WMS( "OpenLayers WMS", 

    urlArray,
    {layers: 'basic'} );