This debate will go in circles for days, nay, weeks!
It's a team thing. The offense's job is to score runs. They take some of the blame, tonight a good chunck of it. The bullpen's job is to not let the other team score. They've done better, but in a tight game, RV gave up the game deciding run, so yes, he does get some of the blame. But ultimately, the loss goes to the Washinton Nationals. Everyone (except maybe Detwiller tonight because if Willie Harris covers second he doesn't give up a hit through 6, but he did walk the bases loaded) get a share in the blame. I'm not expecting perfection, I know that's not realistic, stuff happens, but there's plenty of blame to go around, just as there is credit when they win.