It's possible that, Blake Treinen, like Mookie Betts, could never play a regular season game as a Dodger. The 31-year-old relief pitcher was released by the A's during the offseason after a disappointing 2019 fraught with injuries. However, in 2018, Treinen had one of the best relief seasons ever, with a 0.78 ERA and 38 saves.
Picking up Treinen was an under the radar move for the Dodgers, but also a good one, due to the fact that he was fully healthy for the first time since 2018 and the discount that came with 2019's poor performance (4.91 as opposed to a 2.97 career ERA). He only appeared in one Spring Training game with the Dodgers since he was making some mechanical adjustments during the early part of Spring Training, but he seemed poised for a comeback due to his health and the Dodgers' knack for turning washed-up (which Treinen isn't even yet) players into stars.
If the 2020 season get cancelled, which still seems unlikely based on reports this week, I would just offer Treinen the same contract (10 million - 1 year) as this year were I the Dodgers. Unless he gets injured between now and the start of the season, there's really no reason not to; it's still a win-win situation. If there is baseball in 2020, I would either sign or not re-sign Treinen based on his performance, health, and the readiness of other bullpen candidates, such as Brusdar Graterol.