The Phillies will purchase Arano's contract from Double-A Reading ahead of Tuesday's game against the Marlins, Jim Salisbury of CSN Philadelphia reports.
The 22-year-old had been limited to just 32 appearances with Reading this season due to an elbow injury, which may have contributed to a downturn in performance after a strong 2016 campaign. The Phillies still view Arano as a high-upside relief prospect, and even amid what was a disappointing campaign with Reading, he still struck out a batter per inning while saving nine games. It's not expected that he'll be deployed in a setup role over the final few weeks of the season with the big club, but if Arano thrives in lower-leverage work, he could have a claim to a more meaningful role with Philadelphia in 2018.