Stephen Tobolowsky
Stephen Harold Tobolowsky (born May 30, 1951) is an American character actor. He is known for film roles such as insurance agent Ned Ryerson in Groundhog Day and amnesiac Sammy Jankis in Memento, as well as such television characters as Commissioner Hugo Jarry (Deadwood), Bob Bishop (Heroes), Sandy Ryerson (Glee), Stu Beggs (Californication and White Famous), "Action" Jack Barker (Silicon Valley), Dr. Leslie Berkowitz (One Day at a Time), and Principal Earl Ball (The Goldbergs).
Tobolowsky has a monthly audio podcast, The Tobolowsky Files, of autobiographical stories of his acting and personal life. In 2015, he co-hosted a short-lived second podcast, Big Problems – An Advice Podcast, with David Chen. He has also authored three books: The Dangerous Animals Club, Cautionary Tales, and My Adventures With God.
Source: Wikipedia