Patients who receive femoral nerve catheter with single injection sciatic nerve block will have lower post-operative pain scores at 24, 48 and 72 hours than patients who receive femoral nerve catheter alone. Background and Significance: The proposed project will seek to determine a gold-standard method of pain management after anterior cruciate ligament (ACL) reconstruction in the pediatric population. ACL ruptures are a common injury among young patients. Approximately 17.97 ACL reconstruction procedures per 100,000 person-years are performed in patients younger than 20 in the United States each year. Despite advancements in minimally invasive arthroscopic surgical approaches, postoperative pain following ACL reconstruction remains a concern. Regional anesthesia is increasingly employed as an adjunct to general anesthesia during outpatient orthopaedic procedures. A recent systematic review of 75 Randomized Controlled Trials (RCTs) found that regional anesthesia blocks generally decreased postoperative pain following ACL reconstruction. However, only 1 of these 75 studies considered the effects of regional anesthesia on the pediatric population. Moreover, it has been found that pediatric patients report greater pain and anxiety than adults 24 hours after ACL surgery. Thus, the efficacy of regional anesthesia on the pediatric population remains unclear. This study will seek to establish FNC or FNC+SNB as the gold-standard for perioperative pain management of pediatric patients undergoing ACL reconstruction. Methods: Study design - A prospective RCT will be used to determine the efficacy of regional anesthesia on postoperative pain management in the pediatric population following ACL reconstruction. The RCT will be comprised of two arms: FNC or FNC+SNB The primary aim of the study is to determine if patients who receive femoral nerve catheter with single injection sciatic nerve block will have lower pain scores than patients who receive femoral nerve catheter alone. Secondary aims include comparing total rescue pain medication administered and patient satisfaction between the two groups. The procedure will be performed by a sports medicine surgeon and an anesthesiologist at Children’s Hospital Colorado. Data will be collected for pediatric patients (ages 8-18) undergoing ACL reconstruction.