León with the Boston Red Sox in 2016
|Boston Red Sox – No. 3|
March 13, 1989 |
|May 14, 2012, for the Washington Nationals|
(through April 9, 2017)
|Runs batted in||48|
León signed with the Washington Nationals on January 17, 2007, and made his professional debut with the Gulf Coast Nationals later that year. He spent two years in the Gulf Coast League before splitting the 2009 season between the Vermont Lake Monsters of the New York–Penn League and the South Atlantic League's Hagerstown Suns. León returned to the Suns for the 2010 season and was promoted to the Potomac Nationals in 2011. He spent time with the Auburn Doubledays, Harrisburg Senators, and Syracuse Chiefs in 2012 before his first major league callup.
León was called up to the majors for the first time on May 13, 2012. He made his Major League debut on May 14, 2012. In the fourth inning of his debut, León seriously sprained his right ankle in a collision with Padres' third baseman Chase Headley at home plate.
Boston Red Sox
León was traded to the Boston Red Sox for cash considerations on March 30, 2015. He was designated for assignment on July 21, 2015. On July 30, 2015 he was sent down to the Pawtucket Red Sox. He was re-added to the roster on September 1. Leon started the 2016 season in the minors, but was promoted to Boston on June 5, 2016, when Ryan Hanigan and Blake Swihart went on the disabled list.  He finished his 2016 MLB season with a .310 batting average.
- "Nationals sign four prospects". MLB.com. January 17, 2007. Retrieved April 25, 2016.
- Comack, Amanda (13 May 2012). "Nationals to call-up catcher Sandy Leon in light of Wilson Ramos injury". Washington Times. Retrieved 18 February 2014.
- Porath, Brendan. "Sandy Leon Injury: Nationals' Catcher To Disabled List". sbnation. Vox Media, Inc. Retrieved 5 August 2016.
- Browne, Ian (March 30, 2015). "Red Sox act quickly, acquire catcher Leon from Nationals". MLB.com. Retrieved March 31, 2015.
- B Rowne, Ian. "Leon may stay with Sox when Hanigan returns". mlb.com. Retrieved 17 July 2016.
- "Sandy Leon Stats | Baseball-Reference.com". Baseball-Reference.com. Retrieved 2016-10-24.
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