He's not any particular Outlaw, they've just named a random nailer minion for promotional purposes.

lots of characters got names for promo purposes...
the funny thing is the actual promotional for that game.

swears at EA once again

Nilsworth doesn't appear in the game. He doesn't wear armour, whereas the Nailers in the game do. Even though Nilsworth's image appears when you bounty them. </pedant>