6 walks

The Nationals set a team record (2005-present) for the most walks drawn in a single inning in team history. They had drawn five free bases three times, but not in seven years: June 10, 2005 vs. Mariners (eighth inning); May 5, 2009 vs. Astros (sixth inning); April 7, 2019 vs. Mets (fifth inning).