Daly, 33, recently agreed a new deal to stay with Saracens until the end of the 2027-28 campaign.
This is the second time he has fractured an arm within the space of 10 months, having suffered the same injury during a warm-up game for the British and Irish Lions last July which ruled him out of the rest of their tour of Australia.
For Onyeama-Christie, 27, this is also the latest in a series of injuries he has had in recent seasons, having twice previously broken his arm and also fracturing and dislocating his ankle.
He has played in 19 games for the London club this campaign and, like Daly, also agreed new terms to extend his stay in February.
Saracens return to Prem action on 19 April away at Sale, with six games of the regular season to go.
They have, however, been boosted by the return of prop Alec Clarey, who has been out since November with injury.
Flanker Max Eke is also “nearing availability for selection” having not featured since February 2025, while fellow back row Toby Knight is also returning to training from a long-term knee injury, a club statement said.