Newcastle's ex-England second row Mouritz Botha retires from rugby at the age of 35, on medical advice related to concussion.
Newcastle Falcons fly-half Mike Delany leaves the Premiership club to re-join Bay of Plenty in his native New Zealand.
Newcastle Falcons fly-half Toby Flood says spells at Leicester Tigers and Toulouse developed him as a player.
Premiership champions Exeter will begin their title defence at Gloucester when the 2017-18 season starts on 1 September.
Audio & Video
Newcastle Falcons fly-half Toby Flood says the rugby played last season tempted him into a return from Toulouse.
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