James Harness is the mechanic of the Hoffman Crew. Harness is able to fix anything and everything that becomes broken at the claims. 10 years prior to the mining, Harness was involved in a car accident that left him with a massive spinal injury, and has never been able to afford the surgery. This has caused problems, and in one instance he was in incredible pain because of the work. During the off-season, a Boston medical center, inspired by his story, paid for the much needed surgery, saving the injured mechanic.
Three months after the second season, Todd Hoffman fired him from the Hoffman Crew due to his abscenses over the course of the mining season caused by his huge addiction to pain pills.("Revelations").