How can i get rid of my bony back?

When i'm standing straight up, you can still see my spinal cord sticking out. Most people's backs, there is an indent where their spinal cord is. I am 6'3" weighing 150. ( yes i'm skinny, i have a high metabolism) but i do workout a lot, i do a lot of rotator cuff workouts because I am a pitcher. Anyways, how can i get rid of my bony spinal cord?