Despite his fitness issues, the midfielder has said that he is at the perfect age to make an impact at Celtic.
Celtic will hope the duo can have a positive impact on the squad after a difficult start to the season.
Everton midfielder James McCarthy suffered a double leg break against West Brom on Saturday.
Roy Keane says Everton should worry more about the injuries James McCarthy picks up on their watch...
Do Newcastle want James McCarthy? Maybe not for £25m. Rafael Benitez speaks out about the rumours.
Martin O'Neill and Ronald Koeman are engaging in a war of words over James McCarthy, of all things.
Ronald Koeman even read a prepared statement from a piece of paper on Friday. He means business.
The Everton midfielder is again in the Ireland squad despite being injured.
Oh look what's back! City must be doing poorly. Plus Tierney to Man United, McCarthy to Sunderland...
Martin O'Neill wants to move on from the disagreement with Ronald Koeman, but won't be calling to apologise
Martin O'Neill had accused him of "bleating" but the Everton boss is standing firm.
Martin O'Neill has defended his decision to include Everton's James McCarthy in his Ireland squad.
Everton boss Ronald Koeman hits out at the Republic of Ireland's treatment of James McCarthy.
Sturridge may be complaining about being used out of position, but he isn't the only one...
Sunderland and Newcastle want to sign out-of-favour Everton midfielder James McCarthy, reports suggest.
One player from the 17 clubs who stayed up are looking over their shoulders nervously. Poor Jack.
McCarthy could go to Euro 2016 even if he does not kick another ball before O'Neill names his ROI squad.
There are no strikers on this decidedly un-sexy list of five unsung heroes. Arsenal and Liverpool offer one each.