Two things to keep in mind with Ba:
1. "Stoke boss Tony Pulis believes Demba Ba is a ticking timebomb after West Ham agreed a three-and-a-half-year deal for the Senegal striker.
Ba’s £7.1million move to Stoke collapsed when he failed a medical because of a knee injury, and Pulis said he could not have continued in good faith."
2. He's on £60000 a week.
A very good player though, who on a free could be worth a check out.