Nunez, 24, signed in 2010 as a 17-year-old from the Dominican and was a starter in the system until being shifted in 2015 to the bullpen. He is considered more erratic than Arano; Nunez fanned 10.4 per nine innings but walked 4.6. He spent most of 2016 in Reading's bullpen with a 3.13 ERA in 54 2/3 innings. The Phillies re-signed him to a minor-league deal after the season, but if the Phillies do not add Nunez to the 40-man roster by Friday, he is eligible to be selected in the Rule 5 draft.