Ojimar "OJ" Rosero is a graduate of Edison High School in Stockton, California, where he was an All-Section sprinter and All-League football player. During his junior year he was chosen to represent the United States of America in track and field. He traveled to Europe, Asia, and Africa competing with top high school athletes from across the country. While in Denmark he broke the youth 100m record. His senior year he went undefeated in the 100m and 200m sprints winning the league and section. His season ended after qualifying to go to the state meet but tearing his hamstring in the 200m. For family reasons he chose to attend CSU Chico to play football and run track. After a year at CSU Chico, he transferred to Butte College where he helped Butte go undefeated and win the GVC title in both football and track. 

A torn achilles tendon injury ended his athletic career, but began his coaching career. Coach Rosero became a personal trainer and opened TeamRo Sports Training where he worked with middle school, high school, and college athletes. Many of Coach Rosero's athletes went on to receive scholarships and athletic awards throughout their careers. Coach Rosero moved to Redding and began coaching at Foothill High School coaching football and Sequoia Middle School track, helping Sequoia win four league championships in seven years. In 2021, Rosero became the assistant wide-receiver coach for Shasta College's football team. Rosero's most proud track achievement was helping his son win 100m and 200m titles in high school, junior college and college. Coach Rosero is thankful for his loving wife Jaymi and their children: Chris, Alyssa, Kai, and Jayden.