Complex sentence: The injury required surgery and it was estimated it would take Rollins out of action for approximately six to nine months, therefore Rollins was forced to vacate the WWE World Heavyweight Championship the next day, thus ending his reign at 220 days.
Split into simpler sentences: The injury required surgery and it was estimated it would take Rollins out of action for approximately six to nine months. As a result, Rollins was forced to vacate the WWE World Heavyweight Championship the next day, ending his reign at 220 days.