Basallo is out of the lineup for Sunday's game against the Reds, Jake Rill of MLB.com reports.
Basallo hasn't started against a lefty since June 3, though including Sunday, Baltimore has faced just five southpaw starters during that stretch. The rookie catcher has a .258/.329/.485 slash line with five homers, 15 RBI and six runs in his past 19 contests. Coby Mayo is batting fifth as the designated hitter in Sunday's series finale versus Nick Lodolo.