Complex sentence: It is named after influential automobile designer Harley Earl, who served as the second commissioner of NASCAR, and has been known as the so-called "father of the Corvette" and designer of the Firebird I prototype that adorns the trophy.
Split into simpler sentences: It is named after influential automobile designer Harley Earl, who served as the second commissioner of NASCAR. Earl has been known as the so-called "father of the Corvette" and designer of the Firebird I prototype that adorns the trophy.