Galea, 33, has damaged medial ligaments and could be out for as long as a month, and he is joined on the treatment table by Richard Beaumont and Josh Hodgson, who also picked up injuries in the 36-18 win.
Head coach Craig Sandercock told the club’s official website: “It does look like Rich has broken his fibula which is pretty serious. It’s yet to be confirmed but those are the initial thoughts and he’s off to the hospital at the moment.
“Benny has done his medial so again, that’s another pretty serious one. We’re not quite sure what grade it is yet, we think it’s possibly a grade two, which would mean that he’d be sidelined for least a month.
“Unfortunately, he won’t make round one for us and it’s obviously a big blow to lose your captain. Having said that, when problems like this occur, opportunities present themselves so somebody else will given a chance to do the best they can for their team.
“As for Josh, he’s strained his ankle but hopefully with a bit of luck he’ll be okay for the Leeds game. It will probably be touch and go though.”
Hull KR open their season with a trip to Headingley to face champions Leeds on February 3rd, before going on the road again the following week to face Wakefield.
Their first game at Craven Park comes against St Helens on February 19th, before a trip to Warrington on February 26th.