"The scan seems to show he got off lightly, Saints physio Jim Joyce has told the clubs official website.
"He is not going to play again this season so he can take his time and be ready for pre-season for next term.
"We did worry there might be a possibility of cruciate damage but, touch wood, that does not seem to be the case.
"However, we will have him seen by a knee specialist as a precaution, although we are not expecting him to need surgery."