Leroux felt some soreness and tightness in his calf, but was unable to work through it, general manager Neal Huntington said. Because the Pirates were already short on the bench, they opted to make the move Friday.
Leroux wasn't likely to be with the Major League club much longer anyway, as the Bucs were going to revert to a seven-man relief corps once the bullpen got rested. Leroux had been called up Wednesday after the 'pen had to cover 13 1/3 innings the night before. The Pirates have been playing with a four-man bench since.
Leroux took the loss in Wednesday's game when he gave up a walk-off single in the 10th.
Ciriaco has been up and down between Indianapolis and Pittsburgh all season, and has spent almost all of his time in Pittsburgh on the bench. He can serve as a backup at any infield spot and is also an option to come off the bench and pinch-run.