Jackson Wray is the latest Saracens star to commit to life in the Championship.
The 29-year-old flanker has signed a new contract to keep him at Sarries until the summer of 2023.
Top England players like Owen Farrell, Maro Itoje, Mako Vunipola and Jamie George are already on board for Saracens' stint in the second tier next term.
The club will be relegated from the Premiership at the end of the pandemic-delayed campaign after being punished for salary cap breaches, but Wray is staying put.
Elsewhere, Fiji might only play in a new series of matches involving Six Nations teams and will not become part of the main championship, the BBC has reported, despite the Fiji Rugby Union (FRU) saying it was on the "verge of joining" the annual competition.
FRU chief John O'Connor said in a statement on Thursday Fiji rugby had opportunities "which we could only dream of in the past".
"We are on the verge of joining the Six Nations rugby competition and have Super Rugby New Zealand and Australia knocking on our doors," O'Connor said.
However, the BBC said a Six Nations representative had confirmed the Pacific Islanders might only be involved in a new series involving England, Wales, Scotland, Ireland, Italy and France.
This year's Six Nations can resume from the Covid-19 shutdown in October while a new set of international matches involving the northern hemisphere teams can be played in Europe from 14 November to 5 December after World Rugby recommended a revised calendar.
O'Connor also said FRU chairman Francis Kean would rotate out from the governing body's board and be replaced by Conway Beg.
Kean had stepped down from the World Rugby Council in April and withdrew his nomination for the global