Sandy León, a Venezuelan-born catcher, embarked on his Major League Baseball (MLB) journey with the Washington Nationals. Signed as an amateur free agent in 2007, León worked his way through the Nationals' minor league system, making his MLB debut on May 14, 2012. His initial stint in the majors was brief, as he was primarily called up to provide depth behind the plate. León's early years with the Nationals were marked by limited playing time, as he served as a backup catcher and spent considerable time in the minors.

In 2015, León's career took a new turn when he was traded to the Boston Red Sox. Initially, he continued in a backup role, but his fortunes changed dramatically in 2016. That year, León seized the opportunity to become Boston's primary catcher following injuries to other players. He impressed with his defensive skills and unexpectedly strong offensive performance, finishing the season with a .310 batting average, a career-high. His ability to handle the pitching staff and contribute at the plate earned him praise and solidified his position as a valuable member of the Red Sox roster.

León's tenure with the Red Sox saw him play a crucial role in the team's success. He was part of the 2018 squad that won the World Series, providing steady defense and working effectively with the pitching staff throughout the season and playoffs. Although his offensive numbers declined after the 2016 season, León remained a respected figure for his defensive prowess and game-calling abilities.

In December 2019, León was traded to the Cleveland Indians, where he continued to serve as a backup catcher. His time with the Indians was followed by a stint with the Miami Marlins in 2021. Throughout his career, León was known for his strong arm, ability to manage pitchers, and defensive reliability. While his offensive contributions varied, his defensive skills ensured he remained a sought-after catcher for teams needing depth and experience behind the plate.

Sandy León's career in MLB was characterized by his adaptability and defensive strengths.