Gomez was placed on the paternity list Wednesday, Stephen Gross of the Morning Call reports.
The Phillies have yet to indicate when their closer will be back in action, but a return at some point over the weekend is likely. If the Phillies have a save opportunity during Gomez's absence, they'll likely opt to use Hector Neris to close the game. Neris posted a dominant ERA of 1.69 over 10.2 innings in July and leads the club with 19 holds.