This pilot study evaluates the preliminary effectiveness of a combined rehabilitation program incorporating hold-relax (H-R) stretching techniques and progressive therapeutic exercises on knee pain and range of motion (ROM) in adolescent athletes diagnosed with Osgood-Schlatter disease. Utilizing a retrospective, single-group pre-post design on a cohort of six athletic participants, this study aims to generate preliminary clinical evidence and assess feasibility to inform future larger-scale randomized controlled trials. Participants underwent a structured, multi-week rehabilitation protocol, with primary clinical outcomes assessed before and after the intervention period using validated measures of pain intensity and knee joint mobility.