I've seen situations like that and my experience is that every player have individual grade of aggressiveness...so in my case, in punctual players I see that they go match to match in "attack mode" lol

Then too I talk "about scenarios", is when in some match some player is more aggressive, appear constantly doing fouls and the idea is that we have to sub' this... but as my idea say, is a punctual case in a type of scenario, in 1 of every.... X matchs.

If in your case this situation is too repetitive, only 2 yellows (or 3) per match and to the same player, then thats something new...