H was removed from the pitch just minutes into Saracens’ Heineken Champions Cup clash with
Racing 92 at Allianz Park.
The abrasive back-rower will now be a notable absentee when Eddie Jones names his England squad for the Six Nations on Monday.
It is the latest in a line of arm injuries for the 27-year-old. He broke his right arm in January 2018, and then broke it again in June during England's tour of South Africa.