I watched Sam Sturt land after taking that mark on Sandi's shoulders at training, and I thought, "That kid's an injury waiting to happen."
Some dudes, like Pearce and I suspect Sturt, make themselves more available to injury because they do things with their bodies that their bodies aren't really meant to be doing.
Pearce is 2 metres tall and built like a Greek God. He was also a midfielder as a nipper, pre-growth spurt, and has a belief he can do all sorts of things which plainly his body no longer is capable of supporting.