Iglesias was placed on the 15-day DL on Sunday due to a right shoulder impingement.
Iglesias saw his velocity dip in his last scheduled start Monday, and after feeling a "pinch" in his right shoulder Friday, the Reds decided to scratch him from Sunday's scheduled start. They'll now put the young hurler on the disabled list, which will afford the team an extra roster spot while Iglesias works his way back to full strength. For now, that roster spot will got to Sunday's starter, Tim Adleman.