Ok so while the achievement says to earn a token playing Triple Threat Online, I just wanted to post a solution of how I just got this without playing TTO. All I did was enter a Locker Code for a free guaranteed token which brought up the plinko-style minigame and the ball dropped into a token slot. As soon as I was given my token the cheevo popped. I have no idea how long this Locker Code will be active, hopefully for a while. Let me know if this works for you guys too.
Locker Code: TOKEN-Z32HC-NFFWB-TRTJ4-T6N9G
(does not need to be entered in caps, does need the dashes entered though)
EDIT: I believe you have to be in the MyTeam screen and scroll all the way over to settings and then enter the locker code there, would not let me enter the code on the app or while I was in MyCareer.