Dr Rolard Baumengartner is the stress doctor shown in the Season 4 episode Skips' Stress.
Muscle Man asks everyone questions and Skips becomes frustrated. They head back to the Park until Muscle Man notices a stress tester. He goes on it and shows that his stress is moderate.
Everyone wants Skips to go on it, so he does. His reading then says critical and the doctor comes over. The doctor tells him his stress readings are 'off the chart' and looks at his arm, revealing the dark line of stress. The doctor tells him he will die if he doesn't lower his stress.
Later, at the Park, Benson tries to get Skips to take the day off but Skips tells him he has too much to do.