I'm not at all sure what this bird is. It's absolutely not a Baltimore oriole. It's not the right color for an orchard oriole. And it has too much brown and is waaaay out of its normal range if it's an Audobon oriole. Perhaps it's a young male orchard oriole molting into its adult plumage? It's looked this way for several days - these pictures were taken on May 19 and May 25, in College Park, Maryland. Anybody have a good ID?
added: He is a young male orchard oriole. Thanks, Sarah!