Sheffield United had been linked with a move for the former Southampton defender, who signed for Barnsley on Tuesday.
Southampton defender Jason McCarthy could be an ideal addition at Leeds United.
Shamrock's Trevor Clarke is set to be watched by scouts from Southampton and Sheffield United on Friday.
Rangers want to be more like Southampton - so beating Sheffield United to highly-rated youngster Jason McCarthy wouldn't be a bad place to start.
Southampton youngster Jason McCarthy is on Sheffield United's radar, but could they swoop for Lloyd Isgrove, too?
Sheffield United's League One rivals Fleetwood Town and Bradford City are also said to be keen on the versatile Southampton player.
Southampton defender Jason McCarthy has been out on loan at Walsall this season.
Jason McCarthy, named League One's player of the month for January and currently at Walsall, is out of contract the summer.
The 21-year-old was one of five Saints loanees in action over the weekend.
Jason McCarthy has recently joined Wycombe Wanderers on loan from Southampton.