Mateo was added to the Yankees' 40-man roster Friday.
This was a no-brainer for the Yankees as Mateo is a top prospect in the system and needed to be protected from the Rule 5 draft. He did endure some growing pains at High-A Tampa in 2016, but Mateo has elite speed and there's optimism about his hit tool developing in time. There's been talk about him potentially moving to center field long term.