People

Celina De Borja, MD

PlaySafe Program Director

M_Orthopaedic Surgery

Dr. Celina de Borja is a board-certified pediatrician with fellowship training and certification in sports medicine, who cares for children, adolescents, and young adults with a wide variety of musculoskeletal conditions. In addition to general pediatric orthopedics, her areas of interest include sports and dance medicine, injury prevention, and bone health.

Alyssa Boldt

Athletic Trainer

ADT Ortho Inst. Sports Med

Alyssa joined the UCSF PlaySafe athletic training staff in the summer of 2023. Prior to UCSF, Alyssa worked as an Athletic Trainer at the University of Michigan, providing care for various teams, including women’s soccer, softball, tennis, track and field, cross country, and women’s basketball, after completing her Master’s at the University of Michigan in 2022.

Garrison Chan, ATC

Senior Athletic Trainer

ADT Ortho Inst. Sports Med

Garrison joined the UCSF PlaySafe athletic training staff in the summer of 2022. Prior to his arrival at UCSF, Garrison was the Head Athletic Trainer at Academy of Art University. Garrison received his bachelor's degree in Athletic Training from the University of the Pacific in 2017 and his master's degree in Health and Human Movement from Utah State in 2019. While at Utah State, Garrison worked with the football and men's tennis teams. After completing his master's degree, Garrison did a two-year internship with the San Francisco 49ers.

Kimberly Connors, ATC

Athletic Trainer

ADT Ortho Inst. Sports Med

Kimberly joined the UCSF PlaySafe athletic training staff in April 2025. Before coming to UCSF, she taught Sports Medicine and Introduction to Health Careers at the high school level in the Tri-Valley area.

Elise Hammond

Athletic Trainer

ADT Ortho Inst. Sports Med

Elise joined the UCSF PlaySafe athletic training staff in the fall of 2008. Elise has worked at many schools within the SFUSD over her tenure with UCSF, the longest and most impactful being with Abraham Lincoln and John O’Connell High Schools. Elise has been an active and incredibly important part of the growth of the PlaySafe Program and our services within the SFUSD. She strongly believes in the vision of the program to bring athletic trainers to active populations that lack access and healthcare resources.

Hannah Oyedeji

Athletic Trainer

ADT Ortho Inst. Sports Med

Hannah joined the UCSF PlaySafe program in the summer of 2022. She received her Bachelor of Athletic Training at Boston University in 2019. After graduation, Hannah worked with Precision Athletic Training, providing athletic training services for numerous collegiate, high school, and middle schools in the greater Boston area. Prior to moving to California in 2020, Hannah traveled and worked as a licensed Athletic Trainer in the Phoenix area while climbing the red rocks in Sedona, AZ. Hannah has been the head athletic trainer for Urban High School since she joined UCSF.

Image of Denise Tung

Denise Tung

Athletic Trainer

ADT Ortho Inst. Sports Med

Denise has been with UCSF since 2021 and has made an immediate impact as the head athletic trainer at Washington and Wallenberg High Schools. Denise’s interest in athletic training started at Foothill College in 2014. After receiving her associate’s degree in Athletic Injury Prevention Care and Kinesiology, she continued her studies at San José State University and received her Bachelor of Science degree in Athletic Training in 2021.