69 patients (>18 years of age) with an ACL injury (clinically and MRI confirmed) scheduled for an ACL reconstruction using hamstring tendon autograft were randomized to the timing of surgery either early (within 21 days) or delayed (beyond 6 weeks of the injury). This study aimed to compare incidence of postoperative motion loss and clinical results. Excellent clinical results were seen with ACL reconstructions regardless of whether surgery was performed soon after injury, or after a delayed period, using hamstring tendon autograft. Early ACL reconstructions did not result in loss of motion or suboptimal clinical results, as long as there was a robust rehabilitation protocol, focusing on extension and early range of motion.