Joe Carter, Alex Barbary and Josh Brown will all be back and will link up again with Tomas Seduikis and Louis Allen, who had already signed on for the new campaign, which gets underway on September 12.
Carter and Barbary both missed a large period of last season through injury and Thunder coach Daniel Hildreth is looking forward to having them on board again.
He said: “There were two massive voids in the team last year and both were due to freak injuries that sidelined Alex and Joe. During a university game, Alex was fouled as he dunked the ball and landed awkwardly, which resulted in him needing an operation on a wrist and he missed virtually the whole league season.
“Joe also had a wrist injury that hadn’t healed, meaning he too required surgery and again missed the regular season fixtures.
“Both had made very impressive starts to pre-season and were due to feature heavily off the bench.
“It’s great to see them playing so well again during these summer sessions and it will be great having them back on board.”