Answer
The answer is "Regular Show", an American animated sitcom created by J. G. Quintel for Cartoon Network. It follows the daily lives of two best friends, a 23-year-old blue jay named Mordecai and a 23-year-old raccoon named Rigby, who work as groundskeepers at a suburban park. Stiers had a recurring role in the series as the voice of Dr. Benson, the park's manager.