Fairly certain he works there just like you and I work our jobs. He can leave at anytime if a better opportunity presents itself. It comes down to what he defines as better. He could have made more money covering GB, but wanted to return home to be close to family. Just because ESPN calls, doesn't mean he'd take it and automatically make more- see TG returning to the Buff News. He may, however, be interested in taking same or less to be affiliated with a bigger, more recognizable national brand. Comes down to his priorities and life situation.
To my knowledge, the only ones under contract are on-air talent at major networks etc.