Tim Sheens has confirmed that Hull KR have signed Jimmy Keinhorst, Weller Hauraki and Ryan Lannon for 2019.
Germany international Keinhorst and Salford Red Devils forward Ryan Lannon will both join on three-year deals.
Widnes Vikings back-rower Weller Hauraki has penned a two-year deal with the Rovers.
On the trio of signings, KR coach Sheens said: “We’ve got three good guys coming into the club who are going to add to the personalities we have here.
“Between them they give us some size and some depth. Jimmy has the versatility to play centre, both left and right, and in the second row. He’s a very experienced player with well over 100 first-team appearances along with international experience for Germany and he’s a quality guy as well.
“Ryan’s got a good offload and a good engine. He works hard and we’ve got ourselves a good lad there. He brings the age of the team down a bit as well and he’ll really challenge for those spots in our side. He’s kept some good players out of the team at Salford and he’s been one of their best ball carriers this season.
“Weller is a strong character and a good trainer, which I like. He was the club captain over at Salford which shows what he’s like off the field, but on the pitch he’s very talented with ball in hand and in defence. He adds a lot of experience and he’ll be good value for us.”