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Objective: To identify the prevalence and type of rotator cuff injuries in Brazilian jiu-jitsu practitioners. Method: A cross-sectional and association evaluating patients through non-probabilistic, convenience sampling, performing a bilateral shoulder ultrasound. Results: In the present study, 40 patients practicing Brazilian jiu-jitsu were evaluated; 75% (n = 30) were male and 25% (n = 10) were female, in an age range of 19 to 53 years, with an average age of 31 years, a weight of 80.5 kg (BMI of 27), 82.5% (n = 33) reported pain or discomfort in any of the shoulder arcs of movement, with abduction being more common, with an overall prevalence of 70% (n = 28), followed by flexion (35%, n = 14), extension (22.5%, n = 9), internal rotation (17.5%, n = 7), rotation external (7.5%, n = 3) and adduction (7.5%, n = 3). Conclusions: Eighty percent presented ultrasound findings compatible with rotator cuff injury; the supraspinatus muscle tendon was the most affected element (72.5%). The most frequent finding was tendinopathy in 70% of the practitioners. [ABSTRACT FROM AUTHOR]