The current study aimed at identifying the efficacy of an organized rehabilitation program that was applied to athletes after open surgeries of the shoulder joints. One group pre-test pre-intervention experimental design was used in which twelve male athletes were recruited at the Specialized Centre of sports medicine in Baghdad. The sample was a group of people with lost active range of motion of the shoulder and postoperative limitation, which went through a six-week rehabilitation regimen in two stages: the first stage aimed at mobility and the second one included resistance and strengthening activities. The shoulder joint functionality was measured at the beginning and at the end of the interventions with the help of a goniometer and a graduated wall scale to measure flexion and arm-reach height. The findings have shown statistically significant improvements in both parameters, as the mean shoulder flexion has topped 47.03 and 118.8 and the mean reach height has risen by 13.4 cm to 31.5 cm. These results highlight a clear functional recovery, and thus, it authenticates the design of the program. The paper has also highlighted the ability of the protocol to significantly enhance muscle strength and the joint range of motion in joints that had undergone surgery. The continuous gains that have been realized in the participants indicate that the program has the potential to be replicated. It therefore has the potential of being incorporated into the modern sports-rehabilitation practice and can act as a guide to the development of future protocols. Specific characteristics, including the aspect of progressive loading, stage-based rehabilitation, and objective assessment, were also mentioned as significant in the investigation, and thus the significance of evidence-based rehabilitation in the sports medicine field and the development of post-surgical athlete guidelines.