Given the number of blockbuster opinions that came out in the waning days of the U.S. Supreme Court's 2022-23 term, the court's Mallory v. Norfolk Southern Railway decision may have slipped beneath the radar for many practitioners. Its holding that a plaintiff whose cause of action did not arise in Pennsylvania could sue a corporate entity that did not have Pennsylvania citizenship in the Philadelphia Court of Common Pleas unsettles decades of personal jurisdiction jurisprudence. The ripple effects of Mallory will be felt across many areas of law, including wage and hour.