Northants batsman Rob White will be released at the end of the season.
The 32-year-old has spent his whole career at the County Ground, scoring 5,500 runs at an average of 33.
In 2002, White scored 277 not out against Gloucestershire and that remains the highest maiden century score in the history of English first-class cricket.
Interim head coach David Ripley told the club's official website: "It is very disappointing for all concerned to lose Rob, a local lad who came through the youth system here at Northants.
"He has made match-winning contributions in all formats of the game during his time at the club.
"It has been a frustrating time for Rob this season with limited first-team opportunities, so rather than hang on for a chance that may not come, we feel it's in Rob's best interests to start to look for other opportunities now.
"We wish Rob all the very best in his future career and thank him for his significant contribution to Northants cricket."