Not looking good for Mr. Parker, according to MLBTR:
"More troublingly, fellow Tommy John patient Jarrod Parker left his Triple-A rehab start in a scene that left observers seriously concerned about his arm, as Susan Slusser of the San Francisco Chronicle reports. Parker, who is said to have been overcome by pain after throwing a very wild pitch, walked off with assistance while clutching his surgically repaired right elbow — which is now on its third UCL."
"More troublingly, fellow Tommy John patient Jarrod Parker left his Triple-A rehab start in a scene that left observers seriously concerned about his arm, as Susan Slusser of the San Francisco Chronicle reports. Parker, who is said to have been overcome by pain after throwing a very wild pitch, walked off with assistance while clutching his surgically repaired right elbow — which is now on its third UCL."