The Englishman will take his place on the bench for the decisive third test on Sunday (NZ time).
The tourists shocked the world champions 22-17 in last week's series opener.
The Welsh lock dislocated a shoulder against Japan last month.
The Springboks captain, and winger Makazole Mapimpi, will both start after recovering from the coronavirus.
The Welsh lock had dislocated his shoulder against Japan before leaving for the South African tour.
Siya Kolisi, Jacques Nienaber and 12 other players have returned positive tests.
The British and Irish tourists were scheduled to play the Bulls at Pretoria on Saturday.
The lock is the fourth South African player to return a positive test since the start of last week.
Josh Adams shone as the British & Irish side defeated their namesake in Johannesburg.
The Rugby World Cup holders played their first match in 20 months.
The Irish No.9 will lead the Lions on the tour of South Africa.
Herschel Jantjies, Vincent Koch and Sbu Nkosi have been confirmed as the three players.
Warren Gatland has made several surprising calls for his squad to South Africa this year.
The series is tentatively scheduled to run through July and August.
A decision on the tour is expected before the end of February.
Edinburgh, London, Cardiff and Dublin would host the test matches.
The Lions tour looks like becoming another victim of COVID-19.
The Crusaders coach has expressed his desire to help out his fellow Kiwi in 2021.
Scott Robertson said he's submitted a formal request to be part of the coaching lineup.
Officials have warned the tour could be pushed back 12 months.