Ketel Ricardo Marte Valdez (born October 12, 1993) is a Dominican professional baseball infielder for the Arizona Diamondbacks of Major League Baseball (MLB). He previously played for the Seattle Mariners.
Marte signed with the Seattle Mariners as an international free agent on August 13, 2010. He made his professional debut in 2011 for the Dominican Summer League Mariners.
Marte made his MLB debut July 31, 2015, for the Seattle Mariners.