Exeter Chiefs have signed Will Witty from Premiership rivals Newcastle on a two-year deal, with the lock moving to Sandy Park at the end of the season.
The 24-year-old, who first joined Newcastle's academy in 2013, has made 73 first-team appearances for the club.
He helped Newcastle reach the Premiership play-offs last season and said he has a "big job to do" to help them avoid relegation this season.
"It's going to be a new start for me and certainly a big test," Witty said.
"From the moment I joined the Falcons, they've been brilliant with me and they aided my development into the player I am now. However, the time is right for me to try a fresh challenge with the Chiefs."