Complex sentence: Riggs began wrestling at Cactus High School in Glendale, Arizona, he followed in the footsteps of his hero, Randy Couture, and became an All-American twice, at Glendale Community College (Arizona) to get a Criminal Justice degree.
Split into simpler sentences: Riggs began wrestling at Cactus High School in Glendale, Arizona. He followed in the footsteps of his hero, Randy Couture, and became an All-American twice, at Glendale Community College (Arizona), where he studied to get a Criminal Justice degree.