The second-row forward was found unresponsive at the team's hotel in France on Friday morning.
South African rugby player Hyron Andrews has died suddenly at the age of 31, ahead of the Lions' Champions Cup fixture against La Rochelle.
The second-row forward was found unresponsive at the team's hotel in France on Friday morning.
Emergency services attended, but attempts to revive him were unsuccessful.
Andrews joined the Johannesburg Lions from Sale Sharks during the summer and had featured against Leinster in the United Rugby Championship earlier this month.
The Lions have confirmed earlier today that the match against La Rochelle will proceed in his honour.
A minute's silence will be held at all Champions Cup and Challenge Cup fixtures this weekend as a mark of respect.
The club has extended its condolences to Andrews' wife, Maiglin, their young sons and his wider family.

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