Frank admission after six years of denying it
The 38-year-old leaves after spending only half a season as captain of the club
Croft leaves the club he has been associated with since 1989
Root joins Riki Wessels in leaving Trent Bridge
The veteran has signed up for another year
The batsman scored two Test hundreds for England
"A difficult decision to make"
He played eight times in the County Championship for Derbyshire
“He’s going to leave a gap because he has been one of the best players in the country for a long time"
All three leave the county following the expiry of their contracts