Ketel Ricardo Marte Valdez is a Dominican professional baseball second baseman for the Arizona Diamondbacks of Major League Baseball. He previously played for the Seattle Mariners. Marte made his MLB debut with the Mariners in 2015, and was traded to the Diamondbacks during the 2016–17 offseason. Marte has been named the starting second baseman for the 2019 and 2024 All-Star Game. In 2023, he won NLCS MVP en route to Arizona's first pennant since 2001.
