Duran is absent from the lineup for Thursday's tilt against the Nationals, Ian Browne of MLB.com reports.
The Red Sox have faced a slew of left-handers lately, including Thursday, which has resulted in Duran starting just two of the last six contests. Masataka Yoshida, Rob Refsnyder and Adam Duvall will be Boston's trio of starting outfielders against southpaw Patrick Corbin.