The sharp pain in Samaki Walker's back and the numbness that shoots down his right arm and hand is so scary that it has the Heat forward thinking it might be a career-threatening situation. "I had a talk with my father (Thursday)," said Walker, who didn't play in Friday's home opener against Detroit. "I'm thinking about some options. I talked to coach (Friday) morning. I expressed my frustration with coach about my obligations with this team. It's a decision I feel I'm going to have to make as this goes along and consider my options." Walker said he had a MRI at 6 a.m. Friday and went to a chiropractor later in the day, but doesn't have any answers as to why he's feeling so much discomfort.