Pomeranz (elbow) threw 19 pitches in a simulated game Saturday, the Associated Press reports.
Pomeranz has recently been throwing from a mound with batters in the box, but this was the first time hitters have taken swings against him. The left-hander is recovering from flexor tendon surgery and has yet to pitch this season, so he figures to need plenty of ramp-up time before returning to game action for the Padres.