"He's pitching in some tight spots and I know that's the life of a closer. But at that point it was time to make a move."
Farrell said that right now he isn't considering going another direction with the closer role.
"No move's going to be made," Farrell said. "That's a situation that the closer comes in, tie game at home. But after the two leadoff walks we felt like we had someone behind him ready to go in Koji.
"Right now Joel's going through a little bit of a spell where things aren't clicking for him. But we're still with him. We've got a guy today [who] picked him up in Koji and did one heck of a job to shut off that threat in the ninth."
For his part, Hanrahan said he wasn't worried about the recent struggles and needed to simply get back to throwing strikes and getting outs.
"Obviously, it's not the way I wanted it to go," Hanrahan said. "But we're still winning games. Our bullpen picked us up today and that's what makes a good bullpen."