Full story is on page 71 of The Boy Who Lost His Arm -- and Got It Back.
A Wired Magazine update in 2011: "A year after the surgery Knowles' arm and fingers were sensitive to heat, cold and touch, and he could move his fingers and bend his wrist. He could also play first base – but only with his one good hand. The year after that, he was playing tennis and baseball. After four years of recovery, Knowles had the same use of his right arm and hand as a natural lefty. He eventually drove a six-wheel truck and lifted sides of beef at his job."
