The Dodgers reinstated Treinen (elbow) from the 60-day injured list Wednesday.
Treinen will rejoin the Dodgers' bullpen after pitching 6.1 shutout innings between Single-A and Triple-A during his rehab assignment, striking out eight batters in the process. Eric Lauer (elbow) was placed on the 15-day IL to create space on Los Angeles' active roster, and Will Klein (elbow) moved to the 60-day IL to free up a 40-man spot.