Ryne Tanner Nelson (born February 2, 1998) is an American professional baseball pitcher for the Arizona Diamondbacks of Major League Baseball (MLB).
Nelson was considered one of the top prospects for the 2019 Major League Baseball draft. He was selected by the Arizona Diamondbacks in the second round, with the 56th overall pick, and signed for $1.1 million. He was assigned to the Hillsboro Hops of the Class A-Short Season Northwest League, going 0-1 with a 2.89 ERA over 18+2⁄3 innings, striking out 26. He did not play a minor league game in 2020 due to the cancellation of the minor league season caused by the COVID-19 pandemic.