England Spinner Adil Rashid withdrew his name from Yorkshire's Vitality Blast squad on Friday due to his shoulder injury.
Rashid trained at Emerald Headingley on Thursday and declared himself unfit for the game against Worcestershire due to the worsening of the condition of his shoulder.
The 31-year-old spinner advised the Club's medical staff that his right shoulder is the worst it has been this summer. As a result, he has been referred to England medical staff for treatment and review of his position.
Adil Rashid was originally made available by England from July 25, but a further five days rest was requested which was agreed by the club.