In professional football, the subject of CTE has long been treated as a side issue, or as a relic of a time past. Many people, for example, assume that the risk is lower because modern balls are lighter than they used to be; in fact balls still weigh about the same, between 14oz to 16oz. Newer balls don’t get heavier when wet like the old ones, but every expert I spoke to agreed that modern balls travel faster, so the force at which they connect with a player’s head has likely not reduced. “The modern balls may actually be more of a risk because they’re travelling faster, further and arriving at your head quicker,” said Stewart.