Employee set down trusses EE moved w/telehandler & was removing the slings when felt a pop in EE' arm. The next day examined by PA who set lifting restrictions. Employee was off work for holidays and returned to work on 1/5-1/8 w/restrictions. On 1/9 MRI showed torn muscle requiring surgery. Surgery was performed 1/11/24 @ which time injury changed from Restricted Duty to Lost Tim.