Kopech (knee) will begin a rehab assignment at Triple-A Oklahoma City on Thursday, Fabian Ardaya of The Athletic reports.
Kopech will be pitching in a competitive setting for the first time since he landed on the injured list July 1 due to a torn meniscus, which required surgery. The Dodgers haven't revealed how many minor-league appearances the 29-year-old will need before being activated, though he could be ready to rejoin the Los Angeles bullpen by the end of the month.