Philadelphia selected his contract once the club expanded its roster from 25 players. The Phillies are expected to add more players, but not until they return home for Friday's series opener against the Brewers at Citizens Bank Park.
Hoover hit .247 with two home runs and 27 RBIs in 77 games this season with Triple-A Lehigh Valley. He hit .278 with two doubles and two RBIs in six games with the Phillies. Hoover and catcher Dane Sardinha, who also played this season for the Phillies, had shared time until recently when Hoover started more behind the plate.
"Just being here last year and seeing what this team was able to do was a lot of fun," Hoover said. "I was up here earlier this year, and was able to contribute more than I did last year. That was a lot of fun."