MANILA, Philippines -- Five-time Trainer of the Year and Hall-of-Famer Freddie Roach promised that his prized ward, Filipino boxing icon Manny "Pacman" Pacquiao, will remain an active fighter.

This, after a potential May 5 mega-fight with undefeated American fighter Floyd Mayweather Jr. was scuttled when Mayweather was sentenced to 90 days in jail following a guilty plea to a 2010 domestic violence charge.

"We're not going to wait for him," Roach told Boxing Scene regarding Mayweather's jail sentence. "We're going to fight."

Roach has already received a list of four potential Pacquiao opponents from Top Rank boss Bob Arum: Miguel Cotto, Juan Manuel Marquez, Timothy Bradley Jr. and Lamont Peterson.

A Pacquiao-Mayweather fight has long been considered to be the most lucrative bout in boxing, with the potential to break all records for live gate attendance and pay-per-view buys.

But various issues over the years have prevented the mega-fight from happening, including Mayweather's demands of random blood and urine testing and Pacquiao's subsequent defamation case filed against Mayweather.

The two camps started negotiating again late in 2011, but Mayweather's looming incarceration has put a stop to discussions. The undefeated fighter gets out of jail on April 2012, leaving him little time to be ready for a May 5 fight date.