Nik Lentz issues statement in response to B.J. Penn's callout

After exchanging unpleasantries over the last couple of months, retired UFC hall of famer B.J. Penn posted a message on his Instagram on Wednesday formally challenging Nik Lentz to a fight at UFC 197. The two have had bad blood going back to a lingering feud between Penn and his one-time nutritionist, Mike Dolce, whom Lentz had also used to help make weight at 145 pounds. Penn called out Lentz while doing a television appearance in the fall, but people weren't sure how serious he was at the time