Gary Keedy, Lancashire's left-arm spinner, dislocated a finger towards the end of the C&G match against Worcestershire. He tried to stop a powerful straight drive during the final-wicket stand between Zaheer Khan and Ray Price and immediately left the field for treatment.
However Mark Chilton, Lancashire's captain, is hopeful that he will be fit for the next Championship match, starting on Wednesday, against Kent at Old Trafford.