Ian Nagle and Jerry Sexton have both joined London Irish for the remainder of the season as injury cover.
Nagle joins from Cambridge University while Sexton will be on loan from Exeter.
London Irish Head of Rugby Operations Glenn Delaney said: “We are without three senior locks with George Skivington, Eoin Sheriff and Nic Rouse all currently unavailable.
“Both Ian and Jerry are experienced campaigners and good additions to our squad for the remainder of the season.”