Complex sentence: David Américo Ortiz Arias (born November 18,1975), nicknamed "Big Papi", is a Dominican-American professional baseball designated hitter who occasionally plays first base for the Boston Red Sox of Major League Baseball (MLB).
Split into simpler sentences: David Américo Ortiz Arias (born November 18,1975), nicknamed "Big Papi", is a Dominican-American professional baseball player. Ortiz is a designated hitter who occasionally plays first base for the Boston Red Sox of Major League Baseball (MLB).