Brock is a simple man. After losing his job as a warehouse loader he found himself on the streets where he met Reece Mustella. Desperate to have a job, he became the 'muscle' for Reece and Diana DeBore. Brock wants to quit the life he has made and make up for his misdeeds.
Brock Thornton is a pre-made playable Sim who lives in Garden Heights. He is living with Reece Mustella and their cat, Indie, the household becomes playable after the player finishes "The Best in Show" story. When Alice her dog, Sam got kidnapped. Brock told her that Reece kidnapped him and that he took Sam to the Abandoned House.
Even though none of his facial features use any of the broken Maxis face templates in Create a Sim, when Brock grows into an elder, it becomes clear that his facial features are nonetheless broken.