Are you sure? The Wikipedia range for the Common Sandpiper doesn't mention North America, not to mention that Manasota Beach in in the Gulf of Mexico so I'd be surprised if a European/African vagrant came to here.
Didn't actualy notice the picture was made in America but the Common is seen now and then on the west-coast, however the Gulf of Mexico is realy out of it's range.
Could it then be the Least Sandpiper ?