Kaz Matsui hit .255/.300/.352 last year in 267 ABs and played what everyone seemed to agree was not good defense. It's April 15th, Anderson Hernandez is hitting .167/.167/.167 in only 30 ABs and playing what i think is good defense. Give him at least half the ABs you gave Matsui before you pass judgement and start calling for the return of the guy who has already proven, over a sufficient sample size, that he can't hit. If Anderson Hernandez is hitting .250/.300/.350 at the end of May then i would keep starting him, because his defense is superior. If he's well below that then maybe it is time to give the guy who has shown he stinks another shot... but I wouldn't be so quick to do that either, I'd want to give Keppinger a look first.