D'Arnaud (head) is out of the lineup Sunday against the Padres but is expected to start behind the plate in Game 2 of Monday's doubleheader, Justin Toscano of The Atlanta Journal-Constitution reports.
Chandler was placed on Double-A Altoona's 7-day injured list Sunday with a forearm injury, though Pirates assistant GM Steve Sanders labeled the move as precautionary, Alex Stumpf of MLB.com reports.
Falter came away with a no-decision in Saturday's 1-0 loss to the Cubs, allowing three hits and two walks over 7.2 scoreless innings. He struck out two.
Pirates (Falter 2-2, 3.53) start 3-game series as they host Braves (Elder 1-1, 4.79)
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