Versatile back Andrew Fenby has joined Saracens on a three-month contract.
The 30-year-old Welshman, who can play on the wing and full-back, had announced his retirement after leaving London Irish in the summer.
Director of rugby Mark McCall said: "He is an experienced player. We feel that he can make a valuable contribution.
"With a number of injuries and suspensions to our backline, we are very happy to bring a player of Andrew's talent into the group."