In a medium saucepan, bring the rice and 2 1/4 cups water to a boil. Lower the heat to low, cover and cook until the water is absorbed and the rice is tender, about 15 minutes. Let stand for 5 minutes before stirring in the parsley.
While the rice is cooking, in a large cast-iron skillet, cook the bacon over medium heat until crisp, about 5 minutes; using a slotted spoon, transfer to paper towels to drain. Season the chicken with salt and pepper, place in the pan skin side down and cook, turning once, for 15 minutes; transfer the chicken to a plate. Add the brussels sprouts to the pan, season with salt and pepper and cook, stirring occasionally, until golden-brown, about 15 minutes. Add the bacon and toss.
Squeeze the lemon over the chicken and brussels sprouts. Serve with the rice.