England head coach Stuart Lancaster generally favoured Leicester's Toby Flood in the recent Autumn Internationals but Farrell is hoping to get the nod for the key role for the Six Nations.
He did play there in the superb victory over New Zealand but there's plenty of competition for places.
McCall has promised Farrell the chance to impress in the position in the next few weeks to put himself in the 'shop window' for Lancaster as he makes his decisions for the annual international tournament.
The 21-year-old, who came off the bench to play at outside centre in Sunday's narrow 17-16 win over Northampton Saints, scored two penalties and now McCall will give him his chance.
"Owen will play some rugby at 10 over the next two or three weeks," McCall told BBC Radio 5 live.
"He'll get plenty of rugby there to make sure he's in good form for England when the Six Nations begins."