It appears that BJ Penn might not be done fighting after all.

On Twitter recently, Penn called out Mike Dolce, stating he planed to have a “heart to heart talk with your glass jaw when I see you.”

Penn enlisted the help of the famed nutritionist prior to his fight with Frankie Edgar earlier this year. It marked his debut as a featherweight after competing inside the Octagon and winning UFC gold at both welterweight and lightweight.

The result was not good, as Penn was dominated by Edgar and subsequently announced his retirement from MMA.

Dolce, who has worked with the who’s who in the sport, responded, referring to Penn as “Bully J” for his threats.