Lyon flanker Pierrick Gunther will join Top 14 rivals Oyonnax next season on a three-year deal.
The former Toulon back row arrived in Lyon this season but has endured a difficult campaign, with injury restricting him to just two appearances in the Top 14.
He tore his ACL in the first game of the season for Lyon, before a bicep injury on his comeback in March ruled him out of the remainder of the campaign.
Before joining Lyon, Gunther had been a valuable member of the Toulon squad, and even earned a call-up to the French team, although he was never included in a matchday squad.
Oyonnax will be coached by current Lyon boss Olivier Azam next season.