That inflammation, Thomas said, caused his elbow to lock up when he tried to throw on Friday in Pittsburgh.
Thomas said medical officials recommended allowing the elbow to drain on its own, rather than forcing it. He'll need a few days, anyway, to allow the swelling to reduce from the dye injection he received for the MRI.
Once that happens, Thomas doesn't expect to need much time throwing to get back up to game speed. Still, add up the time, and it appears unlikely he'll be ready to come off the disabled list when he's eligible on Thursday.