I got this achievement in a 5 min game but you can make it longer and you can do it on any difficulty.
To get this achievement you have to get a yellow card with a player then come back on and then get a red card as getting a straight red card didn't give me the achievement.
But to get cards just click the right stick in when you are in a scrum to collapse it.
You'll get a yellow card after doing this a couple of times then when you come back on do it one more time then you will get sent off and pop the achievement