Gomes (head) is out of the lineup for Wednesday's game against the Nationals.
According to Taylor McGregor of Marquee Sports Network, Gomes hasn't yet been diagnosed with a concussion but remains in evaluation after taking a backswing to the head in Monday's series opener. He remains on the Cubs' active roster for now, but the Cubs called up Miguel Amaya from Double-A Tennessee on Tuesday to serve as backup option at catcher behind Tucker Barnhart, who will start Wednesday.