He was man-of-the-match and scored the try that sealed the derby win over Hull FC on debut.
Although helpless preventing a 52-10 loss at Wigan, he was in great form and scored again to then help relegation-threatened Rovers win at his parent club last week.
However, Parcell had to come off late on in the 32-16 success over Leeds having suffered a tear in a shoulder ligament.
The 26-year-old saw specialists last week knowing surgery would rule him out for the rest of the season.
The club decided to rehab the shoulder and reassess in around a month’s time.
Parcell said: “Nothing’s really changed.
“I saw the surgeon (last Wednesday) and we’ll just give it a few weeks to see if it settles down and if not…
“It needs the surgery but I was just trying to play some games before I get it done.
“It’s been tough. I haven’t had many serious injuries really at all in my career so it is very frustrating.
“But it’s all part of playing footy. I just have to manage it and hopefully I can get some games in.
“I hate watching the game. I’d definitely rather be out there so we’ll see how it goes.”
Rovers lost against Huddersfield Giants on Friday - their first game without Parcell - and are joint-bottom with London Broncos and Leeds Rhinos with just six games remaining.