Final answer:
The initial treatment for Osgood-Schlatter disease involves relative rest and specific stretching exercises to alleviate symptoms.
Step-by-step explanation:
The initial treatment for Osgood-Schlatter disease is relative rest and certain stretching exercises. James can benefit from hamstring stretching, heel cord stretching, and quadriceps stretching exercises. This will help alleviate the painful knob below his right knee and allow him to actively participate in sports again.