According to Sheridan , Mayweather looked unbeatable several years back .
The 37 - year - old has slowed down based on Mayweather 's performance Mayweather 's his last two fights against Marcos Maidana .
According to Sheridan , Mayweather looked unbeatable several years back but the 37 - year - old has slowed down based on his performance in his last two fights against Marcos Maidana .