The Durham batsman, Will Smith, retired from cricket at age 36.
Smith, a county champion on three occasions with Nottinghamshire and Durham, has only made an appearance in Division Two this year.
He returned to Chester-le-Street in 2018 after four seasons with Hampshire.
"Due to the lack of opportunities and the willingness to see the young Durham players have as many chances as possible, I can say that now is absolutely the right time," he said.
"I gave it all as a player I can possibly give."
Smith had an average of 32.78 in 183 first-class games, marking 18 centuries.