Boxing’s pound-for-pound king Floyd Mayweather Jr had announced prior to his most recent bout, a one-sided decision win over Andre Berto, that the fight would be his last go-round in the sport.

One might expect that night, September 12 at the MGM Grand in Las Vegas, to take on a historic feel — with a massive crowd of excited fans bidding the sport’s arguably biggest star a farewell.

But… that just wasn’t the case.

Even with the bout taking place in his adopted hometown, and even with “Money” battling to score a 49-0 record to match another undefeated boxing icon, Rocky Marciano — and, even with his announced retirement — the event simply failed to generate the interest of his previous mega-fights.

It’s not hard to see why, either.

The bout was seen as a terrible mismatch, with opponent Andre Berto a massive underdog. On the week of the Mayweather/Berto bout, a controversy about an illegal IV in Mayweather’s previous fight actually overshadowed the proceedings.

Then, the fight happened. As ABC Sports’ Darren Rovell reported, the announced attendance at MGM Garden Arena for the bout was only 13,395, which means about 20% of the seats were empty.

Now, Dan Rafael of ESPN reports that the pay per view buys for the event were also sub par.

The bouts which Rafael mentions against Arturo Gatti and Carlos Baldomir were in 2005 and 2006 respectively. Mayweather won both and would go on to set and break PPV records in mega-fights against Oscar de la Hoya and Manny Pacquiao.

But, earlier this month, he just couldn’t draw the crowd or audience that we’ve come to expect.