Sports-burnout stems from chronic stress. The aim of this study was to investigate the relationship between mental stubbornness and sports-burnout in injured athletes at the Karadeniz Technical University. The present study is a correlational study that is applied in terms of its nature. The statistical population of the present study contains the injured athletes of Karadeniz Technical University, whose number is equal to 39 people. Because of the limited statistical population, we used the total number method. Fuller et al. (2006) Injury Report Form was used to select the injured athletes and the mental stubbornness Questionnaire and Sports disability Questionnaire were used to collect information. To analyze the data, SPSS software version 22 was used, and the Pearson correlation coefficient was used to analyze the relationship between the variables, and finally, the regression coefficient was used to determine and predict the sports-burnout of athletes affected by mental stubbornness. The results show that there is a significant negative relation between confidence (r = -0.51, p < 0.01), sustainability (r = -0.51, p < 0.01), control (r = -0.42, p < 0.01) and a total score of mental strength and sports-burnout of injured athletes (r = -0.47, p < 0.01). We conclude that mental stubbornness reduces the likelihood of athletic impairment in athletes and is a psychological characteristic of a personality that protects athletes from developing athletic impairment.