Five Key X-Factors Hang Over Floyd Mayweather As Clock Ticks On Comeback Fight » As Floyd Mayweather’s comeback bout against Juan Manuel Marquez hits its 30-day countdown, here are the five most important things to watch… David Mayo, www.mlive.com

“Baby Bull” Diaz Prepared For War » It’s an all-too-familiar story, really. • A young boxer goes from prodigy to prospect, from prospect to contender, from contender to champion. • When his career is over, however, whether or not he has fulfilled his aspirations in the ring, he often ends up going somewhere else: From paycheck to paycheck. Or worse, penniless and out on the street. • Juan “Baby Bull” Diaz is not going out like that… Patrick Gutierrez, insidefights.com

Instant Replay OK’d For Boxing, MMA • NAC Approves Using Technology To Confirm Calls » The Nevada Athletic Commission voted unanimously Wednesday to institute instant replay on a limited basis for boxing and mixed martial arts events… STEVE CARP, www.lvrj.com

Kelly Pavlik: The Worst-Managed Career In Boxing? » You may have read that the Oct. 3 Kelly Pavlik-Paul Williams middleweight championship fight has been postponed, but it’s very possible the fight won’t happen at all now. Why? Because Pavlik and/or his team have made a series of boneheaded mistakes, which follows a trail of goofiness that has marked his career since last summer…. Tim Starks, queensberry-rules.com

Gateway To Autumn Begins With Diaz-Malignaggi » A wonderful fall is almost upon us. We’ve been enduring the worst of the “new normal” for about a year now. The corporate cynicism — low sales, high layoffs and “met” earnings — the political instability, currencies that defy supply and demand, and an increasingly unemployed populace unmoored from reasonableness. Now boxing fans get a little compensation… Bart Barry, www.cbssports.com

Boxer Vs. Mixed Martial Artist: It Will Never Work » Boxing, the sweet science; a historic, moving, influential sport that has earned the love of generations of fight fans.  Boxing brought us the Greatest, Sugar Ray, Marciano, The Pac Man.  Boxing is an ageless gem, for which there is no equal. • Boxing fans have witnessed amazing history.  Those fans are highly knowledgeable and well seasoned. • While it may hold no equal, boxing does hold a modern day rival that has been forged in the spirit of what boxing is, meaning prize fighting… Todd Jackson, insidefights.com. 

Clash Of Lightweight Titans  Boxing’s first must-see fight of the fall goes down tomorrow night on HBO, in a lightweight battle between two action fighters of the first order – Juan Diaz and Michael Katsidis… —Dave “Large” Larzelere, www.sportingnews.com