Ignacio Mieres will leave Exeter Chiefs at the end of this season - despite having another year left on his contract.
The 25-year-old fly-half has signed for Worcester after Sandy Park officials agreed to release him from his deal.
After starting the majority of the matches last term, Argentina international Mieres has fallen down the pecking order this time around.
Gareth Steenson, who is under contract for next season, has re-established himself as the first-choice No. 10.
And head coach Rob Baxter said Mieres' desire to win more caps for his country led to him searching for more regular first-team rugby.
"Nacho is wanting to play more rugby, get more starts, and right now he is feeling that will happen more often at another club," said Baxter.
"What we have at the moment is a guy who is very passionate about playing - and he is desperate to play more for Argentina. I think because of those factors, he feels he now wants to go somewhere where he is going to start regularly and put himself in the shop window to get the best opportunity to play international rugby.
"It is a shame, of course, because we never like signing anyone here and them not seeing out their contracts. We tend to feel when you have a player for two or three years, that he will be an Exeter player for two or three years. However, it can't always be like that. As a club we're not going to be awkward and stand in his way, especially with the fact he feels he would like to go somewhere else.
"Obviously there were opportunities for him to play in the future, but I guess it's one of those things. As I've said before, we go with guys who are on form at the time. Steeno had to take the tough medicine last year and Nacho's had to take it a bit this year, but when it adds up that a player decides to move on, sometimes the best thing to do is say thanks for all you have done and help facilitate any move they may want."
See Thursday's Express & Echo for more on Mieres' departure at the end of the campaign.