PITTSBURGH -- Giants manager Bruce Bochy said Friday that reliever Santiago Casilla was not available to pitch during that evening's game in Pittsburgh, barring an emergency situation.
Casilla has a blister on his middle finger. He blew a save in Washington on Thursday, allowing a double and a single and committing a fielding error as the Nationals rallied from a one-run deficit to a 6-5 walk-off victory.
"It wasn't like he was hit hard," Bochy said. "When you change closers, you're gong to have a hiccup now and then. It's gong to happen. These guys aren't going to be perfect. He's been really solid."
Casilla slid into the closer's role in April when Brian Wilson underwent season-ending Tommy John surgery. Casilla has converted 21 of 25 save situations and brought a 2.84 ERA into this weekend's series against the Pirates.
Three of Casilla's four blown saves have come in his last four appearances.
"He had a pretty good break before [Thursday]," Bochy said. "Like everybody, I think it's between pitch selection and location for him."
Bochy acknowledged that the blister might be bothering Casilla more than the reliever has let on. The manager also said Casilla would definitely be available to pitch Saturday.