Nunez is out of the lineup for Sunday's game against the Orioles, Mark Zuckerman of NatsJournal.com reports.
The Nationals will go with Jorbit Vivas at the keystone Sunday while Nunez heads to the bench for the first time since June 12. Nunez started each of the Nationals' last 14 games, slashing .386/.460/.500 with seven runs and seven RBI over that stretch. He also contributed seven stolen bases during that time, bringing his season total to an MLB-leading 32.