Doumit informed the Pirates medical staff on Monday of what he described as a stretch in his right wrist during his fourth-inning at-bat against the Braves on Sunday afternoon. He didn't have any additional discomfort while playing three more innings in the game, but he began feeling some achiness in the wrist Sunday night and Monday.
X-rays came back negative, and the MRI was performed on Monday to try to detect the nature of the injury. However, Pirates general manager Neal Huntington announced after Monday's game that hand specialist Dr. Mark Baratz recommended a CT scan also be done.
"The CT scan will give [Baratz] a better picture of the structure of the wrist and answer the questions that he has at this time," Huntington said. "[It] will give us a more comprehensive picture with respect to the injury, the diagnosis, prognosis and treatment."
Huntington did not make a conjecture on the area or severity of the injury, nor did he know if Baratz believes there may be any structural damage.
"We're hoping for the best," Pittsburgh manager John Russell said.
With Doumit out of the lineup on Monday -- and at this point, indefinitely -- the catching duties will fall on Jason Jaramillo, who had made only one start in his Major League career prior to Monday night. Jaramillo made his Major League debut on April 16, and he also caught two innings on Sunday when he was a late-game substitution.
If Doumit is going to be out for more than a day or two, it could force the Pirates to have to dip into the Minor Leagues for some catching help. Jaramillo and Doumit are the only two catchers the team carries, and without Luis Cruz, who was sent down last week, the Pirates have no defined emergency catcher.
Huntington said no move to bring up another catcher would be done prior to Tuesday's game.
Russell mentioned Delwyn Young, who the Pirates acquired last week, as a potential emergency option.
Triple-A starting catcher Robinzon Diaz likely would get the call if a move had to be made.
With Jaramillo's strength being on the defensive side, the loss of the switch-hitting Doumit also significantly alters the makeup of the Pirates' lineup. Craig Monroe slid into the cleanup spot, Doumit's usual position, on Monday, and Jaramillo occupied the No. 8 hole.
Jenifer Langosch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.