Duran is out of the lineup for Monday's game against the Cubs.
For about a two-week stretch earlier this month, Duran served as the Padres' No. 1 catcher, but he's faded into more of a timeshare since Freddy Fermin returned from the 7-day injured list Tuesday. Though Fermin and Duran have now started three times apiece over the last six games, the playing time will likely tilt more in Fermin's direction once he's further removed from a concussion.