We welcome Dr. Gregory Maletis, MD sports medicine surgeon at Kaiser Permanante Baldwin Park and head of the Kaiser Permanente ACL Registry.  The KP ACL Registry has generated 55 high-quality, peer-reviewed publications, with huge sample sizes.  Dr. Maletis discusses the registry’s inception, history, inner workings, strengths, and weaknesses.  We close by looking at this current study, selected as an AOSSM Specialty Day Abstract 2023 and featured in OJSM, as an example of what the registry can do.