Complex sentence: A native of Santa Cruz, California, he is commonly believed to be the first Mexican-American to play baseball in the major leagues, however, Sandy Nava is actually the first known Mexican American to play in the majors.
Split into simpler sentences: A native of Santa Cruz, California, he is commonly believed to be the first Mexican-American to play baseball in the major leagues. However, Sandy Nava is actually the first known Mexican American to play in the majors.