Bok loose forward extends stay in Paris
The 33-year-old's new deal covers next season with an option for one more at the club which from next term will be coached by his compatriot, Heyneke Meyer.
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The imposing forward joined Stade after the 2015 World Cup from Sharks.
Stade eased their Top 14 relegation worries with a bonus-point victory over champions Clermont last weekend.
Agence France-Presse