Pound-for-pound king Floyd Mayweather Jr. said on Monday that he might not be done with boxing upon the completion of the 30-month deal with Showtime/CBS that he signed earlier this year for up to six fights.

"After my five more fights, guess what? I think after (getting to) 49-0 we may stay in this sport a little longer. This Sept. 14, it's just another walk in the park," Mayweather said to a crowd of about 5,000 on Monday night at the Alamo in San Antonio during the ninth stop of the nine-day, two-country, 10-city media tour that he is on with fellow junior middleweight champion Saul "Canelo" Alvarez (42-0-1, 30 KOs), the 22-year-old Mexican sensation.