I have also the problem with the statistic in online friendlies staying always at 0.
But here a workaround i found out myself to get this achievement:
Play with a secondary account (you need a xbox live gold membership on your secondary account to play online) against a friend in online friendlies. let your friend quit 3 times so that you have 9 points and won the season. (Hopefully it worked with your secondary account. if you have the same problem as with your main account, you have to try with an other account)
So now when you are back in the menu where you see your statistic against your friend, press
then
to sign out. you will go back to main menu now press
and the login window comes up where you see all your profiles that you have on your xbox. now choose your main account and sign in.
Now after you have connect to the ea servers, go to online friendlies choose your friend and press
and you see that you are the current titleholder and ping achievement unlocked.
The trick is the game shows your statistics you have with your secondary account on your main account but if you go back and then in again your statistic will be again to 0.