Yeah, the 2013 season does most of the heavy lifting for Thielbar's career ERA in that list (and his career ERA actually jumped by 0.22 in the 1 game since this tweet, which is another clue of how small his career sample still is). 2013 performance still counts of course, but it's not going to command much attention or appreciation in 2021.
Also, Thielbar has the lowest leverage usage of anyone on the list, by far. Thielbar's average game-entering leverage index is just 0.92. The role of low-leverage short reliever is a rather recent invention, and one of somewhat dubious value.
Thielbar's done some nice things and has a good story, but in terms of contributions to the Twins, the more appropriate comps are guys like Gary Wayne or Terry Leach.