Bad news for Brock Lesnar fans ... Dana White says the former UFC champ has NOT taken him up on his offer to put together a fight with Jon Jones.
And, Dana says he doesn't expect it'll ever happen.
Remember, White previously told us he would be down to make a fight between the ex-heavyweight champ and Jones if both guys really wanted it to happen.
Dana even invited Brock to call him so they could talk out a deal.