Complex sentence: The team still only managed one win; however, it won a school-record 12 games just two seasons later and advanced all the way to WPIAL Championship at Heinz Field, where it lost to eventual undefeated State Champion Thomas Jefferson High School.
Split into simpler sentences: The team still only managed one win; however, it won a school-record 12 games just two seasons later. They advanced all the way to WPIAL Championship, but lost to eventual undefeated State Champion Thomas Jefferson High School.