Hall of Fame trainer Freddie Roach is crossing his fingers that eight division world champion Manny Pacquiao retires from boxing.

The 38 year old veteran suffered a shock decision loss last month at the hands of huge underdog Jeff Horn at the Suncorp Stadium in Brisbane, Australia.

There is a rematch clause, which Pacquiao is exercising, and the second fight is being targeted for a date in fall - likely back in Australia.

Last week, two of Pacquiao's career rival - Juan Manuel Marquez and Timothy Bradley - retired from boxing. By the end of this year, another Pacquiao opponent in Miguel Cotto is also retiring from the sport.

If Roach had his way, he would like to Pacquiao to have the rematch with Horn and then retire - win or lose in the next outing.

He would like Pacquiao to focus his energy on his political career. Last year, Pacquiao secured a senatorial seat in the Philippines. Pacquiao wants to eventually become president of his country - which Roach fears may prompt the boxer to continue his fighting career in order to maintain his popularity among the millions of potential voters.

At this stage of his career, Roach believes it's a tough proposition to place Pacquiao in the ring with the younger generation of fighters like Terence Crawford.

"I would like to see Manny retire after the rematch with Horn. But I have no control over that. I just think it's very difficult at that age to get into the ring and face Terence Crawford and talented youngsters like that," said Roach to Jose Sanchez.

"Manny changed his lifestyle as the years went by. He also lost some of that finishing instinct, I think. But he improved his technical side at the same time. That's why I would like to see him fight again with Horn and retire. But he wants to be president (of the Philippines) and the elections are in four years. So maybe you'll need to continue boxing to maintain your popularity level. "