Sixty athletes with MRI-confirmed grade 2 hamstring injuries were randomized to receive ultrasound-guided Platelet-Rich Plasma (PRP) injections plus standard therapy (n=30) or standard therapy alone (n=30). The primary outcome of interest was time to return to play. Secondary outcomes included MRI healing at 21 days, re-injury rates, and adverse events, with follow-up extending to 24 months. Overa...