Former baseball star Jose Canseco, best known as a power hitter for the Oakland A’s, is interested in bare-knuckle fighting.

Canseco expressed interest in this rising combat sport on Twitter.

While his comment seemed to imply he’s interested in competing in the sport, he may have just been sharing his interest as a fan.

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But then he challenged former major leaguer A-Rod.  

These two both have a juicing history.

Flip the Page to see his tweets: