The Catcher Was a Spy is a 2018 American war film directed by Ben Lewin and written by Robert Rodat, based on the book of the same name by Nicholas Dawidoff. It stars Paul Rudd as Moe Berg, a former baseball player who joined the war effort during World War II and participated in espionage for the U.S. Government. Mark Strong, Sienna Miller, Jeff Daniels, Tom Wilkinson, Giancarlo Giannini, Hiroyuki Sanada, Guy Pearce, and Paul Giamatti also star. The film premiered at the 2018 Sundance Film Festival, and was released on June 22, 2018, by IFC Films.