The Dodgers will select Casparius' contract ahead of Sunday's game against the Cardinals, Fabian Ardaya of The Athletic reports.
Casparius has started in all 18 of his appearances so far this season (13 at Triple-A, five at Double-A), but he'll join the big-league roster Sunday to provide some length out of the bullpen. The 25-year-old has yet to make his MLB debut and logged a 3.54 ERA with a 61:29 K:BB across 56 innings with Triple-A Oklahoma City.