Remove support reps name from picklist

Remove support reps name from picklist

Is there a way to remove a support reps name from the pick list so requests are not assigned accidentally to them?  We had a person leave the company so I removed their login but did not delete the support rep account.  Its my understanding that all requests that support rep dealt with will become open and unassigned if an account is deleted and I do not want that but I do want to remove them from the available support rep list.  Is there a way to hide that persons name?  Thanks.
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