Valverde's pitched very well recently, 8 K in his last 3 IP (saw it on a blurb somewhere). Apparently Melvin says he's now to be entrusted w/ late-game work--not closing, but the 7th and 8th--again. If he does well, and Julio reveals his mediocrity, then he's back on the job. I'd say, give it two weeks. If he performs well and Julio starts giving up a homer here or there, we could see another switch.