Doumit, who had left McKechnie Field by the time the Pirates disclosed the injury, will receive treatment for the ailment on Friday. It's unknown how long he will be out, though oblique injuries often have a tendency to linger.
The Pirates have been in the process of determining how to use Doumit this season, while at the same time continuing to make the catcher available on the trade market. If this injury keeps Doumit sidelined for more than just a few days, it would certainly hurt the Pirates' ability to deal Doumit before the start of the season. It would also shake up the bench.