Loading a flat tire into a pick up and EE felt discomfort in their left arm. EE said it was not bothering self and EE would wait until Monday to see how it felt. It worsened so EE went to a Dr on 8/7/23 who diagnosed a strain - follow-up on 8/14/23 same, then another on 9/7/23 for MRI which showed a torn tendon. Has worked regular job with no restrictions all along.