John C. Brosnan Field Dedication at CVHS

Next Friday, August 25, Castro Valley High School will be hosting a naming and dedication of the football field for "Coach" John C. Brosnan, a beloved Castro Valley high school coach and teacher who shaped the lives of students for 31 years.

This is a posthumous honor that will be given to his daughters Susan, Maureen, and Kathleen. The ceremony starts at 6:30 p.m. prior to the Trojan's home game against Carlmont High School.

The Castro Valley Board of Education voted unanimously, 5-0, in January 2022 to move forward with the naming of John C. Brosnan Field at Trojan Stadium on the Castro Valley High School campus.

Brosnan, or “Coach”—as he was known around Castro Valley—passed in September 2020 at the age of 85. 

He led the Trojans to four Hayward Area Athletic League titles and was named a North Coast Section Honor Coach in 1989.

Brosnan was born on December 22, 1934, in Oakland. He attended St. Elizabeth High School in Oakland, where he met his wife, Maureen. Upon graduation, he joined the army and served in South Korea. After the army, he attended San Francisco State University on the GI Bill and played on the 1962 championship baseball team.

He graduated with a master’s degree in physical education, started teaching P.E. at Castro Valley High School in 1963, and then practically lived there. In addition to P.E., Coach served as the Athletic Director. He coached varsity football for his entire teaching career and periodically coached golf and baseball before retiring in 1994.