Derbyshire's offspinner, Nathan Dumelow, has been released from the final year of his contract.
Dumelow, 23, made his first-class debut against the touring Pakistanis in 2001, and made an instant impact with four top-order wickets, including Yousuf Youhana and Inzamam-ul-Haq.
His opportunities have since been limited, however, and he has played just 25 first-team games in four years, of which only four came in the 2004 season.
"It was unlikely that Nathan would have the opportunity to play much first-team cricket this summer so we have agreed to his request to leave," said Derbyshire's director of cricket, David Houghton. "We wish him well with his future career, whether that lies in the professional game or elsewhere."
"I am sorry to be leaving Derbyshire but have realised that my future lies elsewhere," said Dumelow. "I have enjoyed my years with the club and wish them well for this season and beyond."