Acelino "Popó" Freitas (Portuguese pronunciation: [asɛˈlĩnu pɔˈpɔ ˈfɾejtɐs]; born September 21, 1975) is a Brazilian politician and a former professional boxer who competed between 1995 and 2017.

Fellow Brazilian Eder Jofre, generally recognized as the greatest world champion to come out of that country, was one of Freitas' childhood heroes.

Freitas competed for his native country and won a lightweight silver medal at the Pan American Games 1995 in Mar del Plata.

Between 1997 and 1998, Freitas won four more fights and then took on Francisco Tomas Da Cruz, a former world title challenger of Julio César Chávez.

On January 12, 2002, Freitas decided to sign for a unification bout with the WBA world champion, Joel Casamayor, a Cuban refugee who resides in Florida.

In a classic boxing confrontation between the Brazilian bomber Freitas (129½) and the Cuban boxer Casamayor (129½), the fighters switched roles midway through their encounter in what was reminiscent of Sugar Ray Leonard's first historic face-off with Thomas "Hitman" Hearns back in 1981.

A glancing right-hand to the neck of the off-balanced Casamayor in the 3rd round was ruled a knockdown by referee Joe Cortez and intentionally hitting on the break in the 6th saw the Cuban penalized another point.

On August 7, 2004, Freitas lost for the first time, losing his WBO Lightweight title to Diego Corrales by TKO in the tenth round after being knocked down by a left hook in Connecticut.

On April 28, 2007, he fought Juan Diaz in Mashantucket, USA, losing by TKO after his trainer stopped the bout at the beginning the 9th round, drawing boos from the crowd.