Not exactly true. Joe Choynski was a better boxer in my opinion than what Johnson was, and Jeffries battled him to a draw when he was in his prime. Jeffries, also, always used Peter Jackson as his basis for comparison to all his future opponents, though Jackson was passed his best at that time.Though he never did face a man like Johnson
It was also reported that Jeffries faced with Denver Ed Martin and Frank Childs, though they were never confirmed.
It can be said, that in his short career, that Jeffries fought the best of brawlers, best of stylists.