This skill is exclusive to Sam B
This took me a few attempts.
First make sure you have the tackle skill upgraded to the second tier at minimum otherwise it won't cause damage.
Second get a pistol, I usually find a ram, Jump on a car and shoot him in the head to lower his health to almost empty.
You only do 1 damage if you tackle him head on so let him run towards you then dodge, Analog stick left or right and A for xbox one, Then try and tackle him as many times as you can as I was able to get 3 hits on most times until he turned back to me, Make sure not to die if your Single Player as you'll respawn and his health will have filled again.
I was lucky enough to set him on fire and panicked thinking he was going to die and tackled him and he died and it popped but I can't confirm if this works 100% to get his health low, Set alight then keep tackling his ass ( literally ) but try it and confirm if you can otherwise stick to the above method :)