Queen of the South striker James McFadden could have joined Celtic back in 2003 before he moved to Everton from Motherwell.
Craig Gordon is the first-choice goalkeeper for Celtic and the Scotland national football team at the moment.
Leigh Griffiths is playing well for Celtic and Scotland at the moment.
Brendan Rodgers’s Celtic will face Motherwell in the Scottish Premiership this weekend.
The Scottish Premiership side have signed Dorus de Vries to challenge Gordon.
Motherwell’s James McFadden played under current Sunderland manager David Moyes at Everton.
The former Everton and Birmingham City forward joined Motherwell this week until the end of January, with the aim of making a short-term impact before completing a move to the Union.
The former Everton, Birmingham City and Sunderland forward has recently been on trial with the MLS club, who finish their 2015 campaign this weekend.
Union boss Jim Curtin confirmed on Tuesday that the former Everton and Birmingham City forward is looking to secure a deal with the MLS club.
James McFadden had been without a club since the end of last season.