Complex sentence: Marecic's family moved to Tigard, Oregon when he was a freshman in high school, and Marecic attended Jesuit High School where he played fullback and linebacker, helping Jesuit to Oregon state football titles his junior and senior years.
Split into simpler sentences: Marecic's family moved to Tigard, Oregon when he was a freshman in high school, and Marecic attended Jesuit High School. Marecic he played fullback and linebacker for Jesuit, helping the team to Oregon state football titles his junior and senior years.