James Toney vs. Mike McCallum II, billed as Once Is Not Enough, was a professional boxing match contested on August 29, 1992, for the IBF middleweight title.

[3] Given the indecisiveness of the decision, talks of a rematch happened immediately afterwards during the post-fight press conference with McCallum stating "I'd love to do it again, it wasn't nothing but fun".

[4] A rematch was not agreed to for the time being however, and Toney instead went on to make his next defense against Dave Tiberi in February 1992, being declared the winner by a highly disputed split decision despite Tiberi seemingly dominating the fight.

[6][7] Following Toney winning a non-title tune-up against Ricky Stackhouse, the Toney–McCallum rematch was set to take place on August 29, 1992.

[8] Prior to the fight, Toney and his team, trying to get in the almost 36-year old McCallum's head, presented McCallum a rocking chair inscribed with "Happy Retirement, Mike" at a press conference and the two fighter nearly came to blows at another press conference after Toney suddenly jumped up from his chair and challenged McCallum.