Pediatric acetabular fractures are rare, accounting for only a small percent of pelvic injuries in children. This is a case of a 12-year-old healthy male who sustained a displaced, right posterior acetabular wall fracture following a ground-level fall. It was ultimately determined to be treated through operative management. Intraoperatively, it was noted that the displaced fragment had become trapped posterior to the piriformis muscle. This prompted the surgical release of the piriformis to mobilize the fragment. Afterward, a quarter tubular plate serving as a buttress and multiple cortical screws were placed to secure the fracture. An additional cortical screw and washer were placed for further compression and rotational stabilization. The piriformis was then repaired. The patient was made nonweight bearing for 6 weeks and seen at routine postoperative visits. At 10 weeks postoperatively, the patient had no complaints of pain or difficulty with ambulation and tolerated full range of motion within his right hip. The patient did not return for follow-up, but the mother was contacted at 1 year postoperatively, and she denied any gait or hip range of motion abnormalities within the patient. Unfortunately, no further follow-up was successfully obtained. While most pediatric pelvic injuries can be treated nonoperatively, it has been shown that nonoperative treatment has increased risk of long-term complications. Therefore, surgical consideration remains important as it presents an opportunity for fewer long-term sequelae.