Richard Clark Ellsworth was an American professional baseball starting pitcher, who played in Major League Baseball (MLB) for the Chicago Cubs, Philadelphia Phillies (1967), Boston Red Sox (1968–1969), Cleveland Indians (1969–1970), and Milwaukee Brewers (1970–1971). Ellsworth was an All-Star in 1964.

Lusk is a high-plains town in the eastern part of the U.S. state of Wyoming. The town is the seat of Niobrara County. The town was founded in July 1886, by Frank S. Lusk, a renowned Wyoming rancher, partner in the Western Live Stock Company, and stockholder in the Wyoming Central Railway. Cattle ranching remains the primary industry in the town of Lusk.