Susac is not in the Giants' starting lineup against the Nationals on Monday, Shayna Rubin of the San Francisco Chronicle reports.
Eric Haase will start behind home plate and bat eighth while catching pitches from Logan Webb in Monday's series opener. Susac is slashing .297/.354/.378 with 11 RBI over 83 plate appearances this season but has gone 0-for-8 with two strikeouts over his last two games.