Ralph began his career in theater, most notably performing in Peter and the Starcatcher on Broadway and off-Broadway and producing The Woodsman.

[3] He studied acting at Collin College and then attended State University of New York at Purchase,[4] where he graduated with a BFA degree in 2010.

[6][7] As an artistic director of his company, Strangemen produced several plays including the Obie Award-winning production of The Woodsman by James Ortiz and Edward W.

[8][9][10] In the 2010s, Strangemen produced off-Broadway productions and workshops of The Little Mermaid, Free Delivery, On the Head of a Pin, The Woodsman, and Bernie and Mikey's Trip To the Moon, as well as an annual theater festival.

The same year, Ralph was cast as Quentin Coldwater, the lead role in the Syfy fantasy drama series The Magicians, which premiered on December 16, 2015.