4, and he's changing networks to do it.
The biggest star in boxing dropped a surprise Tuesday while announcing his long-rumored next bout: After several years on HBO, Mayweather is moving to Showtime with a lucrative multi-fight deal.
Mayweather's move is a coup for Showtime. The CBS-owned network has always trailed behind HBO in boxing prominence, but Mayweather (43-0, 26 KOs) is the sport's biggest moneymaker.
Mayweather's Showtime deal could include up to six fights over 30 months. His first bout is against Guerrero (31-1-1, 18 KOs), the WBC's interim welterweight champion. The fight likely will be at the MGM Grand Garden in Las Vegas.
Mayweather turns 36 on Sunday. He hasn't fought since beating Miguel Cotto last May 5.