Premiership champions Exeter Chiefs sign South African lock Wilhelm van der Sluys on a one-year deal.
Rob Baxter signs a new three-year deal with Premiership champions Exeter and will assume the title of director of rugby.
Exeter captain Jack Yeandle says the Premiership champions must stay on the front foot to build on their success.
Premiership champions Exeter will begin their title defence at Gloucester when the 2017-18 season starts on 1 September.
Audio & Video
Exeter prop Tomas Francis looks forward to Wales' chance to make history against Tonga at Eden Park on Friday.
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This week's sport on the BBC includes England's first Test against West Indies, the Women's Rugby World Cup and the Birmingham Grand Prix.