"I don't think as much as pitch selection as pitch location there," Bochy said. "It's such a fine line when you're making a quality pitch that if you have a little something going on with your finger, especially your [middle] finger, which plays a major role in your delivery and command, that'll play a part in you missing some spots."
Casilla last pitched on July 5 when an error-filled ninth inning led to his fourth blown save of the season in the Giants' 6-5 loss to the Nationals. Three of Casilla's four blown saves have come in his last four appearances.
"He's been so good, and he's going to have his hiccup every now and then, and he did," Bochy said. "I don't know what closer hasn't. If you look at his numbers and the [other] guys closing the game, we're pretty good."