Managers tend to get in too much of a “push button” mentality, where they use this guy in the 7th inning, this guy in the 8th etc.
But you really need to be aware of how your guys is throwing first, and not so much about the role.
Shildt is not the only guy who does this. The problem with Shildt is he also takes the push button approach to batting orders. Like the other night when he gave Arenado the night off and put Carpenter at third, but plugged him into the 3 spot. That is just asinine.
If you make a change in the batting order, look at who you have and adjust accordingly.