Brothers Frank and Ken Shamrock have signed a contract to face each other in a MMA match sometime next year.

We’ve both signed a contract to fight each other,” younger brother Frank Shamrock told ESPN. “Ken is down with it. We talked about it two years ago, and we’ve agreed materially to fight.”

“Will the fight happen? Absolutely,” Ken Shamrock told ESPN.com. “He’s got a buttkicking coming to him. Everything I’ve learned, everything I have bottled up in me, is going to come out on him. I’ve still got love for Frank, but I’m angry at him.”

The EliteXC will likely promote this fight as being brother vs. brother but they probably won’t tell you they’re actually adopted brothers.

Ken Shamrock is 9 years older than Frank and has lost his last 5 fights by 1st round knockout or TKO. Frank hasn’t been very active lately and is just 2-2 in the past 5 years.