Justin, aka "Hoops" or "Juice," is the eldest McElroy brother. The nickname of "Juice" was given to him because he drooled all the time while teething. Justin is one of the three titular brothers of My Brother, My Brother and Me, along with his younger brothers Travis and Griffin. Their father is Clint.
Justin is currently the Managing Editor at Polygon, a video game website that he helped found in 2012. He is married to Dr. Sydnee McElroy, and they have a daughter named Charlie, or Chuck. Justin, Sydnee, and Charlie host a medical history podcast titled Sawbones: A Marital Tour of Misguided Medicine.