If anyone has any concern about Manny Pacquiao’s surgically repaired right shoulder, trainer Freddie Roach is not one of them.

“I don't know what his surgeon did with Manny's right shoulder, but he is firing his right with authority and strength. I never thought I would say this but I think it's stronger than his left,” Roach said Thursday after overseeing Pacquiao’s eight rounds of sparring against Ghislain Maduma and Haskell Lydell Rhodes.

Pacquiao tore his rotator cuff in May during his megafight against Floyd Mayweather and had surgery to repair it soon after the decision loss.

Pacquiao, who will add blue-chip prospects Frankie Gomez and Jose Ramirez to his sparring rotation next week, will be fighting for the first time since the Mayweather fight when he meets Timothy Bradley Jr. for the third time in a welterweight fight on April 9 (HBO PPV) at the MGM Grand in Las Vegas.

"I don't know what his surgeon did with Manny's right shoulder but he is firing his right with authority and strength. I never thought I would say this but I think it's stronger than his left." Freddie Roach

After several weeks of training for the fight in his native Philippines with Roach, they arrived back in Los Angeles on Sunday and went to work at Roach’s Wild Card Boxing Club on Monday. Pacquiao sparred on Tuesday and again Thursday.

Pacquiao (57-6-2, 38 KOs) has said the fight with Bradley (33-1-1, 13 KOs) will be the last of his 21-year career, even if few truly believe that. Although Pacquiao said he would surely miss boxing, he said that he is focused on finishing with a bang against Bradley, with whom he has split two fights -- even though the split decision loss in their first encounter in 2012 was one of the most controversial decisions in boxing history, with virtually everyone believing Pacquiao won it easily.

"Will I miss boxing? I'm sure I will, but I am not feeling nostalgic,” Pacquiao said Thursday. “I'm all about what's happening now, and that's being back at Wild Card training. I'm looking forward to my battle against a Teddy Atlas-trained Tim Bradley. Freddie is fired up, too."

Pacquiao, once a knockout machine, has not stopped an opponent since he knocked out Miguel Cotto to win a welterweight world title in November 2009. That has not stopped Pacquiao from thinking knockout against Bradley.

"If the opportunity presents itself, I will go for the knockout,” said Pacquiao, the only fighter to win world titles in eight weight classes. “I know the fans want to see an exciting fight, and I want to give them a most exciting fight and an explosive finale they will always remember.”