Plymouth have re-signed Worcester utility back Sione Tuipulotu and prop George Porter on loan until the summer.
The duo left Albion in 2011 after two years at the club following Worcester's promotion back to the Premiership.
Tuipulotu goes into the Albion squad for their Championship match with Leeds while Porter will join after playing for the Warriors in the Challenge Cup.
"It will be great having both players back in Albion colours," said Plymouth coach Nat Saumi.
"Hopefully the transition is smooth and they are able to pick up our systems and structure very quickly so that they can push for selection."
Utility back Tuipulotu played for Tonga in the 2007 World Cup while prop Porter has played five games for Worcester this season.