Miner was tightening a union and felt a pain in his left forearm. Miner received first aid on date of injury. Referred to outside medical treatment on 2/21/13. On 2/22/13 employee had an MRI with negative findings. Miner recieved restrictions on 3/7/13. Diagnosis: distal bicep tendon rupture. Restrictions: do not use left arm or hand.