Eflin (back) is scheduled to throw a four-inning, 60-pitch simulated game Thursday, which could determine his status for the first turn through the rotation, Meghan Montemurro of The Athletic reports.
The 26-year-old has been battling back spasms during summer camp, but he may not miss any regular-season action if Thursday's sim game goes smoothly. If all goes well, Eflin lines up to start Tuesday against the Yankees, though he likely would have a limited workload. Nick Pivetta should be next in line to start if Eflin isn't ready, since Spencer Howard was already transferred to the team's alternate training site.