Chael Sonnen doesn’t believe Floyd Mayweather Jr. and company are being truthful with the product being put out. Mayweather is retired from professional boxing. However, since his final win against Conor McGregor in Aug. 2017 which saw him obtain a flawless 50-0, he’s performed in three exhibition matches. The first of the bunch came as a massive surprise when Mayweather found his way into Japan-based MMA giant RIZIN Fighting Federation. In that Dec. 2018 New Year’s clash atop RIZIN 14, Mayweather knocked out undefeated superstar kickboxing prodigy Tenshin Nasukawa in two minutes and 20 seconds. This weekend at Super RIZIN…