Complex sentence: At first, it was reported that Moon had damaged his medial ligament and would be back within 4--6 weeks, however, following further scans it was discovered that Moon had torn his cruciate ligament and would be out for 6 months.
Split into simpler sentences: At first, it was reported that Moon had damaged his medial ligament and would be back within 4--6 weeks. However, following further scans it was discovered that Moon had torn his cruciate ligament and would be out for 6 months.