McGrory was born in West Chester, Pennsylvania, the son of Maureen, a homemaker, and William McGrory, an accountant. He studied pre-law at Widener University. He also studied Criminal Justice at West Chester University. McGrory grew to the height of 7 ft 6 in (2.29 m) and had size 29.5 shoes. He was over five feet (1.5 m) tall by the time he completed kindergarten.
McGrory’s large size led to appearances on The Howard Stern Show beginning in December 1996 as a member of Stern’s Wack Pack. He also appeared on Oprah Winfrey‘s daytime talk show and in music videos including Iron Maiden’s “The Wicker Man” and the 1999 Marilyn Manson “Coma White“ (and God is in the TV VHS cover). He can also be seen in Blondie‘s video for their 2003 hit “Good Boys.”
Due to his height and deep voice, he was in demand to play roles in movies cast as a giant – he did so in films such as Bubble Boy (2001), Big Fish (2003), House of 1000 Corpses (2003) and The Devil’s Rejects (2005). Television appearances included Malcolm in the Middle, Charmed, and Carnivàle.