Arano will break camp in the big-league bullpen, Mark Zuckerman of MASNSports.com reports.
Arano came to camp on a minor-league deal but impressed enough to earn a roster spot. He hasn't thrown a major-league inning since 2019, due at least partially to injuries, but he's just 27 years old and has a 2.65 ERA in 74.2 career MLB frames.