Complex sentence: Aledmys Díaz Serrano (born August 1,1990) is a Cuban professional baseball shortstop for the St. Louis Cardinals of Major League Baseball (MLB), who signed him as a free agent on March 9,2014.
Split into simpler sentences: Aledmys Díaz Serrano (born August 1,1990) is a Cuban professional baseball shortstop for the St. Louis Cardinals of Major League Baseball (MLB). The Cardinals signed him as a free agent on March 9,2014.