MANILA, Philippines -- An orthopedic surgeon is claiming that 7-time world champ Manny Pacquiao can smash his way through Floyd Mayweather Jr.’s “shoulder roll” defense with his power punches.

In fact, boxing and martial arts enthusiast Dr. Art Lee said, Pacquiao could even “disarticulate” or disjoint Mayweather’s shoulder roll at 147 pounds.

"Pacquiao can break that defense and his power shots can disarticulate Mayweather's infamous shoulder-rolling defense," said Lee in a report by the MaharlikanTimes.com. 

Mayweather, who remains unbeaten in 40 fights because of his exceptional defense, heavily relies on his shoulder rolls to repel punches during fights.

The shoulder roll defense involves dropping one’s front arm to protect the body while keeping the chin protected by the shoulder, which will be used to ward off the incoming punches to the head.

Lee, however, said that this might not work against Pacquiao, who agreed to fight Mayweather at 147-pounds.

"Pacquiao should be much stronger and devastating at the pre-fight weight of 147 than he was at a catch-weight of 145," said Lee.

And a stronger Pacquiao means bad news to Mayweather’s shoulder.

Pacquiao, who recently won a seventh title from Puerto Rico’s Miguel Cotto, has already compiled 50 wins against 3 losses and 2 draws. His 38-knockout record speaks much about his punching power.

"I believe he is too powerful, too fast and too sleek for Mayweather, Jr. at this stage of his improvement," said Lee.

Pacquiao-Mayweather is seen as a battle between two of the top pound-for-pound fighters in the world today.

Although the fight has yet to be announced, promoters are looking at a March 13, 2010 fight date. The fight purse is reportedly $50 million up front, at a US venue yet to be decided.