Dale Benkenstein has been released by Durham to take up a coaching post with Hampshire while Warwickshire captain Jim Troughton is set to undergo back surgery.
39-year-old Benkenstein missed the majority of the 2013 season with a shoulder injury and asked to be released from his contract.
With no coaching opportunities available in Chester-le-Street, he has joined the Hampshire coaching staff where he will be first-team coach.
It brings to an end a successful association with Durham, during which time he led the side to the Friends Provident Trophy in 2007 and then the County Championship in 2008.
He is also the club's leading first-class run scorer with 9,055 runs.
While Benkenstein will be heading to Barbados with Hampshire for their pre-season tour, Troughton will be missing the trip to undergo back surgery.
The Warwickshire captain missed the end of the season with a lower back problem and although he has been training fully since November, he now needs to undergo an operation.
"Whilst it is frustrating to lose Jim for what is an important period of preparation we must give him the best possible chance of regaining full fitness as soon as possible," Dougie Brown, Warwickshire's Director of Cricket said.
"His absence will give some of our young batsmen more time in the middle whilst we are in Barbados and help them challenge for a place in the starting XI when the domestic season gets underway."
© Cricket World 2014