After punching girlfriend Rihanna in the face, HBO chooses singer Chris Brown to open the fight for the Mayweather-Mosley professional boxing match. Perhaps Brown might consider a new PR firm, since he did punch girlfriend Rihanna in the face.
Appearing at a boxing match could tend to remind America of his recent past. Chris Brown was chosen by HBO to sing the National Anthem prior to the Mayweather-Mosley fight May 2. Maybe opening a boxing match, after physically abusing his own girlfriend, isn't the best venue for rebuilding a singing career.