The 44-year-old Jones (56-8, 40 KOs) was slated to throw fists with the 39-year-old Gunn (21-5-1, 18 KOs) Wednesday at the National Guard Armory in Philadelphia.
Jones most recently exited the ring in June 2012 as a split decision victor over Paweł Głażewski.
Conversely, Gunn (21-5-1, 18 KOs) hasn’t fought since failing to answer the bell for the sixth round versus James Toney in April 2012.
Gunn, who has competed in more than 60 bare-knuckle bouts, is recognized as a badass bruiser with cement fists.
Junior’s collected crowns in four weight classes and was named the 1990s “Fighter of the Decade.”
Jones’ peak moment as a pro likely occurred in March 2003 when he became the first middleweight champion to capture a heavyweight belt in more than 100 years by outscoring John Ruiz.
Unfortunately, Jones has recently suffered brutal knockouts and is a substandard 7-7 in his past 14 paydays.
Considered one of the premier pound-for-pound prizefighters ever, Jones is now a graying liability who should be prevented from boxing.
Although the six-time world titlist would have badly outclassed Gunn in his prime, it’s impossible to presently have any confidence in Jones.