This study was conducted to determine the possible relationship among dietary habits, body mass index, and physical fitness of athletes. To achieve the purpose of the study, the descriptive-correlational research design was used. Fifty-four athletes from the Province of Pampanga who competed in the Central Luzon Regional Athletic Association (CLRAA) in the School Year 2019-2020 served as respondents of the study. Results revealed that dietary and body mass index have significant relationship to the physical fitness of the athletes. Based on the findings, it is suggested that a continuous dietary awareness program should be implemented, unfit athletes should be closely monitored, and coaches and trainers should design and implement effective health and skills related programs for the athletes’ welfare.