Floyd Mayweather Jr. isn't backing off. After his strong performance last weekend in the Fight of the Century -- a fight that saw Mayweather easily dispatch Manny Pacquiao in what ended up being an unanimous decision for Mayweather -- he shouldn't have to pump the brakes on his "best ever" claims.

In an effort to channel even more energy into that discussion, Mayweather has just released a new t-shirt that will only be available for a short period of time. The shirt, as expected, contains the same bold claim Mayweather has been making for what seems like forever.

Floyd Mayweather still thinks he's the best ever.

Again, this isn't exactly shocking news. Even before he took down Pacquiao, Mayweather had been fighting for his case, saying at one point that he was a better fighter than both Muhammad Ali and Sugar Ray Robinson. While some -- most notably George Foreman -- agreed with Mayweather, the majority of fans and analysts dismissed Mayweather's claim. Even Ali posted a not so subtle response to Mayweather on Twitter.

At this point, I think the only thing that could have silenced Mayweather was a Pacquiao win. And as we all know, Mayweather wasn't having any of that last weekend.