Jobe (elbow) threw a bullpen session Tuesday, Evan Petzold of the Detroit Free Press reports.
This marks the first time that Jobe has thrown off a mound since he underwent Tommy John surgery last June. The 23-year-old righty still has a long way to go in his recovery process and isn't expected back until August or September at the earliest, but it's an encouraging sign of progress for one of Detroit's top young arms.