The Bethesda Big Train is a collegiate summer baseball team based in Bethesda, Maryland. The team is a member of the Cal Ripken Collegiate Baseball League (CRCBL), and derives its name from the nickname of Hall of Fame pitcher Walter Johnson, who was a Bethesda resident for ten years. The Big Train plays its home games at Shirley Povich Field. As of August 2021, more than 195 Big Train alumni have played professional baseball, including 17 in the major leagues.