While there might be mods or unofficial patches available online, they are not supported by EA and could potentially harm your game. It's always best to stick to official content and gameplay mechanics.
If you're looking for a game with bare-knuckle fighting, you might want to consider other titles like:
* Street Fighter series: While using gloves, the fights are often very brutal.
* Mortal Kombat series: Features a variety of fighters with various fighting styles, including some who use bare knuckles.
* Tekken series: Offers a variety of fighters with different fighting styles, some of which involve bare-knuckle combat.
Remember to always check the game's official website or community forums for information on supported features and gameplay mechanics.