Ketel Ricardo Marte Valdez, born October 12, 1993, in Nizao, Dominican Republic, is a professional Major League Baseball (MLB) player known primarily as a second baseman for the Arizona Diamondbacks. He began his MLB career with the Seattle Mariners, debuting on July 31, 2015, after signing with them in 2010 as a 17-year-old international prospect[1][3][6]. Marte is a versatile, switch-hitter who has played multiple positions including shortstop, second base, third base, and center field, showcasing strong defensive skills across the infield and outfield[2][7]. In 2018, the Diamondbacks transitioned him from shortstop to second base, where he has excelled, leading all MLB players with 12 triples that year[1]. He has established himself as one of the game’s top players, earning MLB All-Star selections in 2019, 2024, and 2025. Marte achieved a career-high of 32 home runs in the 2019 season and has consistently hit over 20 home runs in multiple seasons[1][2][3]. His offensive profile includes a lifetime batting average around .281, with a balanced ability to hit from both sides of the plate, making him a difficult matchup for pitchers[2][3]. In 2023, Marte was named the Most Valuable Player (MVP) of the National League Championship Series (NLCS), playing a key role in helping the Diamondbacks reach the World Series[1][3]. He also won National League Silver Slugger awards in 2024 and 2025 and was named to the All-MLB First Team those same years, underscoring his elite offensive performance[3]. Standing 6 feet tall and weighing approximately 210 pounds, Marte continues to be a critical contributor to the Diamondbacks, maintaining high rankings in key batting metrics such as on-base percentage and runs batted in during recent seasons[3][4]. His skill set and consistent production keep him relevant as one of MLB’s top players as of 2025.