Leeds United have just decided to cash in on Crysencio Summerville as the Dutchman leaves to join West Ham, and he could be joined in leaving Elland Road by another key player. Summerville becomes the seventh player sold by Leeds this summer as The 49ers desperately try to take in some cash to ease Profit & Sustainability Rules concerns and avoiding a possible points deduction. He follows Archie Gray, Glen Kamara, Marc Roca, Diego Llorente, Kris Klaesson and Charlie Cresswell in leaving for a fee. But Leeds could still lose more key stars before the end of the summer transfer window. Indeed, G…