Scott Olsen starts Wednesday

Scott Olsen, bumped his start Sunday by the return of Jason Marquis, will re-enter the Nationals' rotation Wednesday, a day after Stephen Strasburg makes his return. The re-scheduled start will give Olsen seven days of rest between starts.

The Nationals' starter for Thursday is "very much up in the air," Manager Jim Riggleman said. Any of Livan Hernandez, Craig Stammen, Ross Detwiler or John Lannan could make the start. The Nationals will have to choose of them -- with Hernandez's spot seemingly secure -- to knock from the rotation thanks to Strasburg and Marquis taking spots.

One pitcher without a return on the foreseeable horizon is Chien-Ming Wang. The Nationals are planning on implementing several pitchers into their rotation this month. Wang won't be one of them.

"We haven't even mentioned his name," Riggleman said. "The fact that we're talking about these others, I'm not counting him. But that would be a really nice surprise to see him show up in September ready to pitch. I'd have to hear a lot more encouraging news."

General Manager Mike Rizzo took a more optimistic tone in regard to Wang. "I don't prescribe to that," Rizzo said. "I think there's still a chance he pitches for us this year. I think he's progressing -- he's slowly progressing, but progressing. He's now throwing off-the-mound bullpens on a regular basis. We'll have to see where he's at. I expect him to pitch for us this year."