Jersey forwards Nick Selway, Pierce Phillips and Gary Graham have signed new deals until the end of next season.
The Championship side now have a total of 12 players under contract for the 2016-17 campaign.
Selway, 26, is in his third season with the Channel Islanders and made the switch from prop to hooker towards the end of last season.
"He can continue to develop and push on to get more opportunities," Jersey boss Harvey Biljon told the club website.
"There's still a lot of preparatory work to be done for 2016-17 but I'm pleased with where we are at this stage of the season."
Phillips, who plays as a lock, has captained the side in several of their British & Irish Cup matches this season, while Graham, 23, joined Jersey from Scottish club Gala in February 2015.