Derbyshire batsman Dan Redfern has left by mutual consent after nine years with the club.
The 23-year-old, who was 12 months into a three-year contract, has scored 3,213 runs in 70 first-class matches.
But he found his opportunities limited during the 2013 season, in which he was also troubled by a hip tendon injury.
"Dan's had a number of issues - both on and off the field - which made last season challenging," head coach Karl Krikken told the club's website.
"While it's always difficult to see players leave, both Dan and the club feel a new challenge is the best route forward."
Left-hander Redfern only managed 184 runs in seven Championship games at an average of 14.15 this summer as Derbyshire were relegated from Division One.
Despite that. he said: "I have thoroughly enjoyed my time at Derbyshire and I thank Krikk and the team for their support.
"The decision to move on is tough, but a fresh start will open new opportunities for me in the next stage of my career."