The subject of this case report, E.P.G was a 26-year-old man, (1.75m and 69kg), who had participated in CrossFit® for five years. As part of his training, the athlete performed the ring dip with five series of six movements, the first without additional weight, and the later series with 10 kg, 20 kg, 30 kg, and 40kg respectively. The weights were added using two vests and two bags. (). During the eccentric phase of the last series the patient reported feeling a “click”, as well as the feeling that the left pectoralis major was “tearing apart”. Subsequently he also reported stiffness and loss of movement in the left shoulder complex. A Magnetic Resonance Image (MRI) was performed and verified a complete rupture of the sternal portion of the left pectoralis major tendon (non-dominant arm), with retraction of 5 cm of the tendinous stump, signs of edema, as well as stretching of the clavicular portion (). A surgical approach was chosen considering the potential benefits regarding the rate of return to sport when compared to conservative treatment.