Date of birth
John White was Phil Brown's first signing at Blues, and his latest contract extension in the summer of 2017 will take his stay at Blues to five years.
A versatile defender who has played at right back, but more recently at centre back, spent nine years with rivals Colchester United, featuring regularly every season.
He had a short loan spell with Blues in 2009 and made six appearances before returning to Colchester.
A move back to Roots Hall was made permanent in June 2013 following the expiration of his Colchester contract.
White made his 150th appearance for Blues in the 4-0 win at Chesterfield at the back end of the 16/17 season.