Entering this season, Baseball America ranked Craig Stammen as the #20 prospect in the Nationals organization, and he made it into the majors at the end of May. His best start so far came against the Yankees at Yankee Stadium on June 18 when he threw 6 1/3 innings of shutout ball. Other than that, he's been so-so and almost sent to the bullpen.
Jason Marquis, meanwhile, is an All-Star.