Another injury blow for Ireland
NEWS: A new halfback pairing with start Ireland's final Test of the year against Argentina on Sunday after scrumhalf Jamison Gibson Park was ruled out with a thigh injury.
Gibson Park, 29, has shone in both the wins in November over Japan and New Zealand getting the nod to start over flyhalf Johnny Sexton's long-time partner Conor Murray.
Sexton faces six weeks on the sidelines due to twisting his knee and ankle in the impressive 29-20 victory over the All Blacks last Saturday.
"Jamison Gibson Park has been ruled out of the final game of the end-of-year series against Argentina this coming Sunday. Gibson Park has a thigh injury," read an Irish Rugby Football Union statement on Wednesday.
Gibson Park and Sexton's Leinster teammate James Ryan replaces the latter as captain as he has done on previous occasions when the 2018 World Player of the Year was injured.
Luke McGrath has been drafted into the squad as Gibson Park's replacement.
However, head coach Andy Farrell is likely to opt for the Munster pairing of veteran scrumhalf Murray and fly-half Joey Carbery to start against the Pumas with the Irish chasing an eighth successive Test win.