Linebacker living in a safety's frame who needs to be put in a position to see fewer big bodies while also learning to slip them when possible. Sullivan has adequate pursuit range and enough toughness for the linebacker position, but he's not big enough or strong enough as a tackler in those areas if he's to make a living as a 4-3 Will linebacker. His athleticism and special teams potential work in his favor and there might be a defensive coordinator who sees potential in him as a sub-package defender. He's a likely undrafted free agent, but does have an outside shot to make a roster.