Jones will open the year in the Phillies' big-league bullpen, Matt Gelb of The Athletic reports.
Teams can carry two extra players over the first four weeks of the season to account for the shortened spring, so the Phillies will open the year with a 10-man bullpen. Jones has only made a single one-out appearance in his major-league career and struggled to a 5.44 ERA for Triple-A Lehigh Valley last season, so he'll need to impress early on if he's to stick around once rosters shrink to 26 in early May.