The Orioles have run basically their whole 25-man roster through trade waivers and so they know who they can and can't trade in the remainder of August.
Ty Wigginton and Luke Scott are two that will be staying. Sources have told us that both were claimed by another team and the Orioles pulled them back. If the Orioles tried to slip them through waivers again and they were claimed a second time – by any team -- the Orioles would lose their rights to Wigginton and/or Scott.
That's not going to happen. So Scott and Wigginton will finish out the year as Orioles. We don't for sure about anyone else, though we're pretty confident that highly paid pitchers Kevin Millwood, Michael Gonzalez and Koji Uehara cleared waivers.
The trade waiver process is confidential, so it's tough to confirm who cleared and who didn't. But president of baseball operations Andy MacPhail said he doesn't expect any trades this month. The only way that changes is if some team has interest in a player who cleared and is not considered a part of the future – like Aubrey Huff last year.