The MLS side, now managed by the Rs' former centre-back Ryan Nelsen, have brought the 24-year-old to BMO Field as a replacement for the retiring Torsten Frings
Toronto, now managed by ex-Hoops defender Ryan Nelsen, are looking to strengthen their squad following the retirement of former Germany international Torsten Frings.
And the Reds have added Ephraim to their ranks, even though the 24-year-old has not started a league game for the Rs since they won promotion to the Premier League, with Harry Redknapp's side confirming the move on Wednesday afternoon.
Nelsen will know all about Ephraim from their time together at Loftus Road, while the Reds are also keen to take a closer look at trialists Bostock and Earnshaw. Bostock is already in Toronto, while Earnshaw is set to arrive on Wednesday.
"[Earnshaw] arrives to take a look at us and for us to take a look at him to see if that's a fit that might work," Payne added.
"It's a little too early to tell if that's going to happen."