Shaun Lunt has rejoined Leeds from Hull KR with fellow hooker Matt Parcell moving in the opposite direction, the Super League clubs have announced.
Cumbrian Lunt, who won the Grand Final during a loan spell with the Rhinos from Huddersfield in 2012, has moved to Headingley until the end of the season with the possibility of an extension.
Former Brisbane and Manly forward Parcell has also moved until the conclusion of the 2019 campaign as both clubs rejig their squads in the battle against relegation.
Lunt, 32, joined the Robins in 2015 but has struggled for game time this season, making just seven appearances. Australian Parcell, 26, helped Leeds to Grand Final success in 2017 and has scored in 31 tries in 79 appearances for the club but the switch is partly motivated by salary cap and overseas quota considerations.
Rhinos director of rugby Kevin Sinfield said: "I would like to welcome Shaun back to the club.
"He is an outstanding professional who knows our club well. He had a huge impact on the squad during his first spell here."
Lunt could make his debut in the Rhinos' clash with Catalans Dragons on Sunday while Parcell has gone straight into the Rovers squad for Thursday's derby against arch-rivals Hull FC.
Robins coach Tony Smith said: "I'm delighted to have Matt at the club. What he has got is something that we're lacking a little bit at the moment and that's depth in that dummy-half position.
"He can split teams up and we need to do that. I think he'll do a fantastic job for us and he'll slot in very well."
Parcell's signing comes a day after centre Junior Vaivai left Rovers for Championship side Toulouse.