Complex sentence: As amateur wrestling grew after World War II, various collegiate athletic conferences also increased the number and quality of their wrestling competition, with more wrestlers making the progression of wrestling in high school, being recruited, and entering collegiate competition.
Split into simpler sentences: As amateur wrestling grew after World War II, various collegiate athletic conferences also increased the number and quality of their wrestling competition. The pattern soon developed in which more wrestlers would make the progression of wrestling in high school, being recruited by college coaches, and then entering collegiate competition.