Robert Guerrero isn't a sure thing win for Mayweather

By Allan Fox: There's talk of Floyd Mayweather Jr. possibly fighting WBC junior middleweight champion Saul "Canelo" Alvarez on September 14th if Mayweather can get past Robert "The Ghost" Guerrero (31-1-1, 18 KO's) on May 4th, but I think the last thing that Golden Boy Promotions and Mayweather should be doing at this point is