Boxing icon Floyd Mayweather Jr. is going in-in. The sports mogul has fired off some serious shots at rival Oscar De La Hoya.

Floyd hit up Instagram Monday (November 5) and didn’t hold back on ripping De La Hoya.

Over the past few days, Oscar has trolled Money Mayweather on his IG page.

A few hours ago, G-Unit boss 50 Cent went at Mayweather for announcing a comeback fight set to go down next month in Japan.

According to reports, Mayweather’s decision came shortly after he signed a new promotional deal.

The boxer announced his decision after signing for mixed martial arts promotions company RIZIN Fighting Federation. Mayweather has never fought in MMA before and the format for the Nasukawa fight has not yet been confirmed. “I wanted to do something different,” said the former five-weight world champion. (CNN)