For one reason or another, ringing, or the act of a competitor using an account other than their own for competitive purposes, is an issue among the Call of Duty elite. This is definitely an issue specific to Major League Gaming, as publicly impersonating other players
in other, more physical sports would be pretty difficult. Of course, certain stats and configuration may be wildly different depending on which account a player is using, and it wouldn’t be fair to skew a match based on statistics and factors which aren’t a players own. This really only pertains to online matches, as all players must be present in the same arena for offline or LAN matches.