
The Predator
as Quinn McKenna

Holbrook was discovered while working part-time as a carpenter for Jenny Wiley Theatre in Kentucky. He signed with Elite Models in 2001. He has worked for other agencies such as Wilhelmina Models. Holbrook has been a model for such designers and labels as Gucci, Jean Paul Gaultier, Versace, Hugo Boss, Bill Blass, Calvin Klein, Moschino, Marc Jacobs and DSquared².
Holbrook and model Omahyra Mota were the subjects of photographer Ellen Von Unwerth Paris gallery exhibition "Omahyra & Boyd" and the 2005 book of that title from Exhibitions International.
He released a short series of poems through the website Model-Max.com, accompanied by illustrations by Jamie Strachan.