Leukemia is a progressive disease, so treatments, blood / bone marrow transfusion is or may be an ongoing thing till till or when patient, family decides to stop it . It depends on the severity or agressiveness of the cancer and what particular cell is being attacked.
Moreso, depends on how long his tx will take and the agressiveness of it. If it stops way b4 the soccer season starts, then he might be ready and up to task.
