Complex sentence: A star athlete at Malverne High School, he was signed to play baseball with the Brooklyn Dodgers but never played for them because he joined the army in 1941 and was discharged in 1945 with the rank of captain.
Split into simpler sentences: A star athlete at Malverne High School, he was signed to play baseball with the Brooklyn Dodgers but never played for them because he joined the army in 1941. He was discharged in 1945 with the rank of captain.