Floyd Mayweather Jr., at 36, may have grown up a bit

At the last news conference before his fight with Saul 'Canelo' Alvarez, Floyd Mayweather Jr. seems friendlier, confident, and not desperate to back up his boasts.LAS VEGAS — It seemed to be a warmer, friendlier Floyd Mayweather Jr. who did his last dance with the media Wednesday before Saturday's fight with Saul "Canelo" Alvarez.