Interesting Nationals call-ups

[Big Mac]

The Nationals called up Ross Detwiler, who hasn't pitched above class A Potomac, and Justin Maxwell, who also hasn't played above class A.

http://mlb.mlb.com/news/article.jsp?ymd=20070903&content_id=2186539&vkey=news_mlb&fext=.jsp&c_id=mlb

[Elbren]

The Nationals called up Ross Detwiler, who hasn't pitched above class A Potomac, and Justin Maxwell, who also hasn't played above class A.

http://mlb.mlb.com/news/article.jsp?ymd=20070903&content_id=2186539&vkey=news_mlb&fext=.jsp&c_id=mlb

Isn't that the Detwiler they just drafted?? And he's not even going to play that much?? Doesn't this start his arbitration clock a bit early?? Can someone help me understand this because this makes absolutely no sense to me.

I really do not understand Bowden.