Olivier is an ex Shimlas and Grey College boy who made his way into the Cheetahs side in 2015.
Wiese was invited to trials for the South Africa Under-20 squad as they prepared for the 2015 World Rugby Under 20 Championship, but wasn't included in the training squad named a week later.
At the end of 2016, Wiese was included in the Cheetahs Super Rugby team's training group for the 2017 Super Rugby season, but it was also announced that he would link up with the Welkom-based Griffons after his Varsity Cup commitments.
Both Oliver and Wiese will be in action on Friday evening when the Free State XV host the Leopards at Shimla Park in round three of the Super Sport Rugby Challenge.
