Stewart is not in the lineup for Wednesday's game against the Mets, but passed his concussion tests after taking a hit to the head in Tuesday's contest, Bill Brink of the Pittsburgh Post-Gazette reports.
Stewart stayed in the game Tuesday after a bat struck his head, but he will get Wednesday off due to several bumps and bruises he suffered. In his place, the Pirates are starting Erik Kratz behind the plate while Francisco Cervelli is on the disabled list due to a hand injury. Stewart should be back in the lineup for Thursday's game.