Durham pace bowler Steve Harmison faces "two or three weeks" on the sidelines after X-rays confirmed a small fracture in his wrist.
The former England seamer suffered the injury after being struck on the forearm batting at the non-strikers end following a drive from team-mate Phil Mustard in last week's LV=County Championship fixture at Hampshire.
Both Harmison and opening batsman Mark Stoneman (broken hand) have been ruled out of Durham's forthcoming Division One fixture against Yorkshire at Headingley.
However the North East county are boosted by the return of seamer Graham Onions for the trip to West Yorkshire.
Head coach Geoff Cook said, "It's a real shame to lose Mark and Stephen but these things happen in sport and we're lucky enough to have depth to our squad which gives two other players the chance to come in and make an impact.
"It's great to welcome Graham back into the squad, he's worked incredibly hard throughout his rehabilitation but it's important that we time his return to the field in the County Championship correctly.
"There is a lot of four day cricket over the next two months and we need to make sure we bring him in at the right time."