Reports have claimed that the Ireland international is pondering a switch to the Sydney club, but former Leinster coach Cheika has tried to play down such suggestions.
"Obviously I know Brian very well," BBC Sport quotes Cheika as saying. "I saw him before I left. I went to say goodbye but we haven't spoken since.
"It is no secret that he is one of a number of top players over there who would love to come down and play in the Super 15. We don't have a marquee player and whether we would go down that road is something we would have to discuss."
O'Driscoll has been at Leinster since 1999.