Sure, he wasn't good enough for a contender in Minnesota (which is why the Twins designated him for assignment), but he did throw more innings than any Nationals reliever, with a better ERA than most of them.  Maybe Minnesota just wasn't the place for him; there's a huge difference between his home and road ERAs (5.59 vs. 2.08).  His ERA over the last 30 days is 3.00.  I'd take that coming out of the bullpen.