Does anyone remember that fella we had on loan from West Ham (I think) about 10 years ago, I think he was called Tony Stokes? He was always shattered and never lasted 90 minutes despite being a YOOF. In the end they figured out he actually suffered from an iron deficiency(no pun intended) or something which was easy to remedy, maybe Wilson has something similar?
I'm not 100% confident about any of the details in the above post