Ospreys physio Chris Towers explained: "Richard underwent an arthroscopic procedure to remove a loose piece of cartilage floating in his right shoulder. The early signs are excellent and the shoulder is settling well. It's too early to predict an exact date for when we can expect Richard on the field but he will miss the start of the season. However, this is a relatively minor procedure so he won't be sidelined for too long. We'll assess his situation closely and will be in a better position to predict his return in a couple of weeks."
The Ospreys begin their Magners League campaign with a trip to the Galway Sportsground to play Connacht on Friday, 5 Spetember (k.o 18:30).