Panthers' Origin quartet to back-up in NRL

Matt Encarnacion

Penrith coach Anthony Griffin is confident all four of his State of Origin stars will back up for Friday's NRL clash against Canberra.

Griffin said James Maloney, Nathan Cleary, Reagan Campbell-Gillard and Tyrone Peachey all pulled up well following the Blues' game one win and have flown straight from Melbourne to the nation's capital.

"We'll check them when we get there after they've done some rehab but at this stage it looks positive that they'll all play," Griffin said on Thursday.