Complex sentence: Jeff Hartings was also a high school teammate and graduating classmate of former Ohio State, Philadelphia Eagle, and Oakland Raider quarterback Bobby Hoying at St. Henry High School, which is quite remarkable because the average graduating class at St. Henry is about 50 kids.
Split into simpler sentences: Jeff Hartings was also a high school teammate and graduating classmate of former Ohio State, Philadelphia Eagle, and Oakland Raider quarterback Bobby Hoying at St. Henry High School. Which is considered to be remarkable because the average graduating class at St. Henry is about 50 kids.