Salford City Reds have signed St Helens stand-off Lee Gaskell and hooker Stuart Howarth has moved the other way, both on season-long loan deals.
Gaskell, who can also play at centre, has made 43 appearances since coming through the Saints' youth ranks.
The 22-year-old has found opportunities limited this season, but has gone straight into the Reds' 19-man squad to face Huddersfield on Friday.
Howarth, 23, featured in every Salford match last season.
"Stuart has shown in his time at Salford that he is a capable and experienced player and he will prove more than adequate cover for a multitude of positions," Saints head coach Nathan Brown said.