Republic of Ireland manager Stephen Kenny has called for reinforcements after losing Seamus Coleman, John Egan and Harry Arter to injury ahead of Sunday's Nations League trip to Wales.
Coleman and Arter missed Thursday night's 3-0 friendly defeat by England with hamstring and calf problems respectively, while Egan lasted just 14 minutes at Wembley after suffering a blow to the head in a collision with team-mate Conor Hourihane, and all three have returned to their clubs.
The squad have also lost Alan Browne and Callum Robinson to positive coronavirus tests.
In response, Kenny has called up six players - with Newcastle's Ciaran Clark and Blackburn's Darragh Lenihan arriving to provide defensive options, while U21 star Jason Knight and Anderlecht's Josh Cullen also link up with the squad.
As previously flagged, Jack Byrne and Ryan Manning join up with the squad for the upcoming games.
A Football Association of Ireland statement read: "Republic of Ireland manager Stephen Kenny has called in four players to the squad to face Wales in Cardiff in the UEFA Nations League.
"Midfield duo Jason Knight and Josh Cullen have linked up with the squad as well as defenders Darragh Lenihan and Ciaran Clark ahead of the UEFA Nations League match against Wales on Sunday, November 15, with kick-off at 5pm.
"Shamrock Rovers midfielder Jack Byrne and Swansea City's Ryan Manning have also linked up with the squad ahead of training at the Cardiff City Stadium later this evening.
"Seamus Coleman, John Egan and Harry Arter have returned to their clubs."
Ireland face Wales in Cardiff on Sunday before hosting Bulgaria on Wednesday still awaiting the first win of Kenny's six-game reign.
Striker Aaron Connolly was ruled out of all three games with a hamstring injury earlier this week, while James McCarthy was not involved against England for family reasons.
