Travis

He is a hunter friend of Sam and Dean. It is assumed that he and Sam got in contact when Dean was in hell.

Background
Travis calls Sam up for some help due to recently Travis breaking his arm. He tells Sam to watch Jack Montgomery, and later tells them that Jack is a Rugaru. Travis knows this because, in the past, he hunted Jack's father and didn't know that the wife was pregnant with Jack. He is also sure that Jack will turn.

Travis later takes matter into his own hands and goes to Jack's house. There he finds out that Jack's wife is pregnant. Not about to let another Rugaru roam he ties her up and waits for Jack to return home. Jack returns home and Travis knocks him out. As Travis is preparing to burn the house down, Jack breaks free and attacks. Jack has Travis pinned and he takes the first bite. Travis is eaten alive and in result allows Jack to become a Rugaru.