O'Malley went 3-for-5 with a run in Saturday's 14-5 victory over the Blue Jays.
The 28-year-old shortstop put together his second multi-hit effort of July and first since the second game of the month. O'Malley is receiving extended opportunity during Kete Marte's (illness) absence, and is slashing .241/.405/.276 in July.