Peggy Young (plaintiff) worked as a delivery driver for United Parcel Service, Inc. (UPS) (defendant). When Young became pregnant, her doctor told her not to lift more than 20 pounds, but UPS required delivery drivers to be able to lift 70 pounds. UPS said Young could not work with a lifting restriction, even though UPS accommodated other workers with lifting restrictions for other reasons. Young brought a disparate-treatment claim under the Pregnancy Discrimination Act (PDA), arguing UPS had a light-duty-for-injury policy for workers who were injured on the job, had disabilities covered by the Americans with Disabilities Act (ADA), or had lost their Department of Transportation (DOT) certifications, but not pregnant women. UPS moved for summary judgment, claiming Young had not shown discrimination against her as compared to similarly situated employees because the employees allowed to work light duty were too different to qualify as similarly situated to Young. The trial court granted summary judgment, and the appellate court affirmed. Jones appealed to the Supreme Court.