Hull have given Australian winger/centre Steve Michaels a new contract for the 2016 Super League season.
Hull have also confirmed that overseas pair Jordan Rankin and Setaimata Sa will be released at the end of the season as part of a shake-up of Lee Radford's squad.
The 27-year-old Michaels has started all but three of the Black and Whites' 26 matches since joining them on a one-year deal from Gold Coast Titans at the start of the season.
Hull coach Lee Radford said on Friday: "He was a bit of an unknown quantity to some when we announced his signing last year but he's been a great addition to the squad and over the last six performances he's really started to shine and show us his true credentials."
Stand-off or full-back Rankin, who joined the club from Gold Coast Titans two years ago, is expected to return home after Radford announced that Jamie Shaul will be his first-choice full-back in 2016.
Sa, the former Catalans Dragons centre or second rower who joined Hull from London Irish 18 months ago, will also leave the club when his contract expires in November.
"Jordan has been a fantastic acquisition for the club and an absolute pleasure to coach while he has been here," Radford said.
Radford said Setaimata was a model professional and had "some really great games for us".
"Like Jordan, should we have infinite cap space and quota spots then we would retain him in our squad at the drop of a hat."
Also on the way out of Hull are winger Tom Lineham, who is joining Warrington, and prop Mickey Paea, who is returning to the NRL while Scott Taylor, Frank Pritchard and Carlos Tuimavave are confirmed recruits for the Black and Whites, who are tipped to re-sign Danny Washbrook from Wakefield and are being linked with Melbourne winger Mahe Fonua.
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