Millwall manager Neil Harris confirmed that the 38-year-old is not quite up to scratch in terms of fitness but should be there in a couple of weeks.
The Socceroos star is currently unattached and in search of a new club to find form for Australia ahead of Russia 2018, with Queens Park Rangers allegedly keen.
The Fulham star could follow a long line of Moyes success stories from the Football League.
Tim Cahill would offer Nottingham Forest experience, but he would not be a good signing for the long-term for Aitor Karanka's side.
Nottingham Forest are reportedly interested in signing Tim Cahill in the January transfer window.
Nottingham Forest have reportedly offered a contract to the free agent.
Leeds United should consider making a move for free agent Tim Cahill.
Glasgow Rangers' Alfredo Morelos has more goals this season than both Millwall centre forwards combined.
Forget Millwall, Everton fans want Tim Cahill back at their club.
Everton legend Tim Cahill has become available, after his contract at Melbourne City expired.
The Australian international played under Moyes at Everton and is being linked with a move away from current club Melbourne City.
Tim Cahill’s goal celebrations are well known around the footballing world, but his latest effort could land him in hot water with Fifa, who may investigate what appeared to be a “sponsored” celebration.
It was typical of Tim Cahill’s big-game temperament that he marked his much-anticipated A-League debut with a goal.